diff options
60 files changed, 7044 insertions, 2127 deletions
diff --git a/Documentation/core-api/refcount-vs-atomic.rst b/Documentation/core-api/refcount-vs-atomic.rst index 322851bada16..976e85adffe8 100644 --- a/Documentation/core-api/refcount-vs-atomic.rst +++ b/Documentation/core-api/refcount-vs-atomic.rst @@ -54,6 +54,13 @@ must propagate to all other CPUs before the release operation (A-cumulative property). This is implemented using :c:func:`smp_store_release`. +An ACQUIRE memory ordering guarantees that all post loads and +stores (all po-later instructions) on the same CPU are +completed after the acquire operation. It also guarantees that all +po-later stores on the same CPU must propagate to all other CPUs +after the acquire operation executes. This is implemented using +:c:func:`smp_acquire__after_ctrl_dep`. + A control dependency (on success) for refcounters guarantees that if a reference for an object was successfully obtained (reference counter increment or addition happened, function returned true), @@ -119,13 +126,24 @@ Memory ordering guarantees changes: result of obtaining pointer to the object! -case 5) - decrement-based RMW ops that return a value ------------------------------------------------------ +case 5) - generic dec/sub decrement-based RMW ops that return a value +--------------------------------------------------------------------- Function changes: * :c:func:`atomic_dec_and_test` --> :c:func:`refcount_dec_and_test` * :c:func:`atomic_sub_and_test` --> :c:func:`refcount_sub_and_test` + +Memory ordering guarantees changes: + + * fully ordered --> RELEASE ordering + ACQUIRE ordering on success + + +case 6) other decrement-based RMW ops that return a value +--------------------------------------------------------- + +Function changes: + * no atomic counterpart --> :c:func:`refcount_dec_if_one` * ``atomic_add_unless(&var, -1, 1)`` --> ``refcount_dec_not_one(&var)`` @@ -136,7 +154,7 @@ Memory ordering guarantees changes: .. note:: :c:func:`atomic_add_unless` only provides full order on success. -case 6) - lock-based RMW +case 7) - lock-based RMW ------------------------ Function changes: diff --git a/Kbuild b/Kbuild index 65db5bef2e36..4a4c47c38d1d 100644 --- a/Kbuild +++ b/Kbuild @@ -6,7 +6,8 @@ # 2) Generate timeconst.h # 3) Generate asm-offsets.h (may need bounds.h and timeconst.h) # 4) Check for missing system calls -# 5) Generate constants.py (may need bounds.h) +# 5) check atomics headers are up-to-date +# 6) Generate constants.py (may need bounds.h) ##### # 1) Generate bounds.h @@ -59,7 +60,20 @@ missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE $(call cmd,syscalls) ##### -# 5) Generate constants for Python GDB integration +# 5) Check atomic headers are up-to-date +# + +always += old-atomics +targets += old-atomics + +quiet_cmd_atomics = CALL $< + cmd_atomics = $(CONFIG_SHELL) $< + +old-atomics: scripts/atomic/check-atomics.sh FORCE + $(call cmd,atomics) + +##### +# 6) Generate constants for Python GDB integration # extra-$(CONFIG_GDB_SCRIPTS) += build_constants_py diff --git a/MAINTAINERS b/MAINTAINERS index ea60bf137aaf..5e5529b9ffc8 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2608,6 +2608,7 @@ L: linux-kernel@vger.kernel.org S: Maintained F: arch/*/include/asm/atomic*.h F: include/*/atomic*.h +F: scripts/atomic/ ATTO EXPRESSSAS SAS/SATA RAID SCSI DRIVER M: Bradley Grove <linuxdrivers@attotech.com> diff --git a/arch/arm64/include/asm/atomic.h b/arch/arm64/include/asm/atomic.h index 9bca54dda75c..1f4e9ee641c9 100644 --- a/arch/arm64/include/asm/atomic.h +++ b/arch/arm64/include/asm/atomic.h @@ -42,124 +42,131 @@ #define ATOMIC_INIT(i) { (i) } -#define atomic_read(v) READ_ONCE((v)->counter) -#define atomic_set(v, i) WRITE_ONCE(((v)->counter), (i)) - -#define atomic_add_return_relaxed atomic_add_return_relaxed -#define atomic_add_return_acquire atomic_add_return_acquire -#define atomic_add_return_release atomic_add_return_release -#define atomic_add_return atomic_add_return - -#define atomic_sub_return_relaxed atomic_sub_return_relaxed -#define atomic_sub_return_acquire atomic_sub_return_acquire -#define atomic_sub_return_release atomic_sub_return_release -#define atomic_sub_return atomic_sub_return - -#define atomic_fetch_add_relaxed atomic_fetch_add_relaxed -#define atomic_fetch_add_acquire atomic_fetch_add_acquire -#define atomic_fetch_add_release atomic_fetch_add_release -#define atomic_fetch_add atomic_fetch_add - -#define atomic_fetch_sub_relaxed atomic_fetch_sub_relaxed -#define atomic_fetch_sub_acquire atomic_fetch_sub_acquire -#define atomic_fetch_sub_release atomic_fetch_sub_release -#define atomic_fetch_sub atomic_fetch_sub - -#define atomic_fetch_and_relaxed atomic_fetch_and_relaxed -#define atomic_fetch_and_acquire atomic_fetch_and_acquire -#define atomic_fetch_and_release atomic_fetch_and_release -#define atomic_fetch_and atomic_fetch_and - -#define atomic_fetch_andnot_relaxed atomic_fetch_andnot_relaxed -#define atomic_fetch_andnot_acquire atomic_fetch_andnot_acquire -#define atomic_fetch_andnot_release atomic_fetch_andnot_release -#define atomic_fetch_andnot atomic_fetch_andnot - -#define atomic_fetch_or_relaxed atomic_fetch_or_relaxed -#define atomic_fetch_or_acquire atomic_fetch_or_acquire -#define atomic_fetch_or_release atomic_fetch_or_release -#define atomic_fetch_or atomic_fetch_or - -#define atomic_fetch_xor_relaxed atomic_fetch_xor_relaxed -#define atomic_fetch_xor_acquire atomic_fetch_xor_acquire -#define atomic_fetch_xor_release atomic_fetch_xor_release -#define atomic_fetch_xor atomic_fetch_xor - -#define atomic_xchg_relaxed(v, new) xchg_relaxed(&((v)->counter), (new)) -#define atomic_xchg_acquire(v, new) xchg_acquire(&((v)->counter), (new)) -#define atomic_xchg_release(v, new) xchg_release(&((v)->counter), (new)) -#define atomic_xchg(v, new) xchg(&((v)->counter), (new)) - -#define atomic_cmpxchg_relaxed(v, old, new) \ - cmpxchg_relaxed(&((v)->counter), (old), (new)) -#define atomic_cmpxchg_acquire(v, old, new) \ - cmpxchg_acquire(&((v)->counter), (old), (new)) -#define atomic_cmpxchg_release(v, old, new) \ - cmpxchg_release(&((v)->counter), (old), (new)) -#define atomic_cmpxchg(v, old, new) cmpxchg(&((v)->counter), (old), (new)) - -#define atomic_andnot atomic_andnot +#define arch_atomic_read(v) READ_ONCE((v)->counter) +#define arch_atomic_set(v, i) WRITE_ONCE(((v)->counter), (i)) + +#define arch_atomic_add_return_relaxed arch_atomic_add_return_relaxed +#define arch_atomic_add_return_acquire arch_atomic_add_return_acquire +#define arch_atomic_add_return_release arch_atomic_add_return_release +#define arch_atomic_add_return arch_atomic_add_return + +#define arch_atomic_sub_return_relaxed arch_atomic_sub_return_relaxed +#define arch_atomic_sub_return_acquire arch_atomic_sub_return_acquire +#define arch_atomic_sub_return_release arch_atomic_sub_return_release +#define arch_atomic_sub_return arch_atomic_sub_return + +#define arch_atomic_fetch_add_relaxed arch_atomic_fetch_add_relaxed +#define arch_atomic_fetch_add_acquire arch_atomic_fetch_add_acquire +#define arch_atomic_fetch_add_release arch_atomic_fetch_add_release +#define arch_atomic_fetch_add arch_atomic_fetch_add + +#define arch_atomic_fetch_sub_relaxed arch_atomic_fetch_sub_relaxed +#define arch_atomic_fetch_sub_acquire arch_atomic_fetch_sub_acquire +#define arch_atomic_fetch_sub_release arch_atomic_fetch_sub_release +#define arch_atomic_fetch_sub arch_atomic_fetch_sub + +#define arch_atomic_fetch_and_relaxed arch_atomic_fetch_and_relaxed +#define arch_atomic_fetch_and_acquire arch_atomic_fetch_and_acquire +#define arch_atomic_fetch_and_release arch_atomic_fetch_and_release +#define arch_atomic_fetch_and arch_atomic_fetch_and + +#define arch_atomic_fetch_andnot_relaxed arch_atomic_fetch_andnot_relaxed +#define arch_atomic_fetch_andnot_acquire arch_atomic_fetch_andnot_acquire +#define arch_atomic_fetch_andnot_release arch_atomic_fetch_andnot_release +#define arch_atomic_fetch_andnot arch_atomic_fetch_andnot + +#define arch_atomic_fetch_or_relaxed arch_atomic_fetch_or_relaxed +#define arch_atomic_fetch_or_acquire arch_atomic_fetch_or_acquire +#define arch_atomic_fetch_or_release arch_atomic_fetch_or_release +#define arch_atomic_fetch_or arch_atomic_fetch_or + +#define arch_atomic_fetch_xor_relaxed arch_atomic_fetch_xor_relaxed +#define arch_atomic_fetch_xor_acquire arch_atomic_fetch_xor_acquire +#define arch_atomic_fetch_xor_release arch_atomic_fetch_xor_release +#define arch_atomic_fetch_xor arch_atomic_fetch_xor + +#define arch_atomic_xchg_relaxed(v, new) \ + arch_xchg_relaxed(&((v)->counter), (new)) +#define arch_atomic_xchg_acquire(v, new) \ + arch_xchg_acquire(&((v)->counter), (new)) +#define arch_atomic_xchg_release(v, new) \ + arch_xchg_release(&((v)->counter), (new)) +#define arch_atomic_xchg(v, new) \ + arch_xchg(&((v)->counter), (new)) + +#define arch_atomic_cmpxchg_relaxed(v, old, new) \ + arch_cmpxchg_relaxed(&((v)->counter), (old), (new)) +#define arch_atomic_cmpxchg_acquire(v, old, new) \ + arch_cmpxchg_acquire(&((v)->counter), (old), (new)) +#define arch_atomic_cmpxchg_release(v, old, new) \ + arch_cmpxchg_release(&((v)->counter), (old), (new)) +#define arch_atomic_cmpxchg(v, old, new) \ + arch_cmpxchg(&((v)->counter), (old), (new)) + +#define arch_atomic_andnot arch_atomic_andnot /* - * 64-bit atomic operations. + * 64-bit arch_atomic operations. */ -#define ATOMIC64_INIT ATOMIC_INIT -#define atomic64_read atomic_read -#define atomic64_set atomic_set - -#define atomic64_add_return_relaxed atomic64_add_return_relaxed -#define atomic64_add_return_acquire atomic64_add_return_acquire -#define atomic64_add_return_release atomic64_add_return_release -#define atomic64_add_return atomic64_add_return - -#define atomic64_sub_return_relaxed atomic64_sub_return_relaxed -#define atomic64_sub_return_acquire atomic64_sub_return_acquire -#define atomic64_sub_return_release atomic64_sub_return_release -#define atomic64_sub_return atomic64_sub_return - -#define atomic64_fetch_add_relaxed atomic64_fetch_add_relaxed -#define atomic64_fetch_add_acquire atomic64_fetch_add_acquire -#define atomic64_fetch_add_release atomic64_fetch_add_release -#define atomic64_fetch_add atomic64_fetch_add - -#define atomic64_fetch_sub_relaxed atomic64_fetch_sub_relaxed -#define atomic64_fetch_sub_acquire atomic64_fetch_sub_acquire -#define atomic64_fetch_sub_release atomic64_fetch_sub_release -#define atomic64_fetch_sub atomic64_fetch_sub - -#define atomic64_fetch_and_relaxed atomic64_fetch_and_relaxed -#define atomic64_fetch_and_acquire atomic64_fetch_and_acquire -#define atomic64_fetch_and_release atomic64_fetch_and_release -#define atomic64_fetch_and atomic64_fetch_and - -#define atomic64_fetch_andnot_relaxed atomic64_fetch_andnot_relaxed -#define atomic64_fetch_andnot_acquire atomic64_fetch_andnot_acquire -#define atomic64_fetch_andnot_release atomic64_fetch_andnot_release -#define atomic64_fetch_andnot atomic64_fetch_andnot - -#define atomic64_fetch_or_relaxed atomic64_fetch_or_relaxed -#define atomic64_fetch_or_acquire atomic64_fetch_or_acquire -#define atomic64_fetch_or_release atomic64_fetch_or_release -#define atomic64_fetch_or atomic64_fetch_or - -#define atomic64_fetch_xor_relaxed atomic64_fetch_xor_relaxed -#define atomic64_fetch_xor_acquire atomic64_fetch_xor_acquire -#define atomic64_fetch_xor_release atomic64_fetch_xor_release -#define atomic64_fetch_xor atomic64_fetch_xor - -#define atomic64_xchg_relaxed atomic_xchg_relaxed -#define atomic64_xchg_acquire atomic_xchg_acquire -#define atomic64_xchg_release atomic_xchg_release -#define atomic64_xchg atomic_xchg - -#define atomic64_cmpxchg_relaxed atomic_cmpxchg_relaxed -#define atomic64_cmpxchg_acquire atomic_cmpxchg_acquire -#define atomic64_cmpxchg_release atomic_cmpxchg_release -#define atomic64_cmpxchg atomic_cmpxchg - -#define atomic64_andnot atomic64_andnot - -#define atomic64_dec_if_positive atomic64_dec_if_positive +#define ATOMIC64_INIT ATOMIC_INIT +#define arch_atomic64_read arch_atomic_read +#define arch_atomic64_set arch_atomic_set + +#define arch_atomic64_add_return_relaxed arch_atomic64_add_return_relaxed +#define arch_atomic64_add_return_acquire arch_atomic64_add_return_acquire +#define arch_atomic64_add_return_release arch_atomic64_add_return_release +#define arch_atomic64_add_return arch_atomic64_add_return + +#define arch_atomic64_sub_return_relaxed arch_atomic64_sub_return_relaxed +#define arch_atomic64_sub_return_acquire arch_atomic64_sub_return_acquire +#define arch_atomic64_sub_return_release arch_atomic64_sub_return_release +#define arch_atomic64_sub_return arch_atomic64_sub_return + +#define arch_atomic64_fetch_add_relaxed arch_atomic64_fetch_add_relaxed +#define arch_atomic64_fetch_add_acquire arch_atomic64_fetch_add_acquire +#define arch_atomic64_fetch_add_release arch_atomic64_fetch_add_release +#define arch_atomic64_fetch_add arch_atomic64_fetch_add + +#define arch_atomic64_fetch_sub_relaxed arch_atomic64_fetch_sub_relaxed +#define arch_atomic64_fetch_sub_acquire arch_atomic64_fetch_sub_acquire +#define arch_atomic64_fetch_sub_release arch_atomic64_fetch_sub_release +#define arch_atomic64_fetch_sub arch_atomic64_fetch_sub + +#define arch_atomic64_fetch_and_relaxed arch_atomic64_fetch_and_relaxed +#define arch_atomic64_fetch_and_acquire arch_atomic64_fetch_and_acquire +#define arch_atomic64_fetch_and_release arch_atomic64_fetch_and_release +#define arch_atomic64_fetch_and arch_atomic64_fetch_and + +#define arch_atomic64_fetch_andnot_relaxed arch_atomic64_fetch_andnot_relaxed +#define arch_atomic64_fetch_andnot_acquire arch_atomic64_fetch_andnot_acquire +#define arch_atomic64_fetch_andnot_release arch_atomic64_fetch_andnot_release +#define arch_atomic64_fetch_andnot arch_atomic64_fetch_andnot + +#define arch_atomic64_fetch_or_relaxed arch_atomic64_fetch_or_relaxed +#define arch_atomic64_fetch_or_acquire arch_atomic64_fetch_or_acquire +#define arch_atomic64_fetch_or_release arch_atomic64_fetch_or_release +#define arch_atomic64_fetch_or arch_atomic64_fetch_or + +#define arch_atomic64_fetch_xor_relaxed arch_atomic64_fetch_xor_relaxed +#define arch_atomic64_fetch_xor_acquire arch_atomic64_fetch_xor_acquire +#define arch_atomic64_fetch_xor_release arch_atomic64_fetch_xor_release +#define arch_atomic64_fetch_xor arch_atomic64_fetch_xor + +#define arch_atomic64_xchg_relaxed arch_atomic_xchg_relaxed +#define arch_atomic64_xchg_acquire arch_atomic_xchg_acquire +#define arch_atomic64_xchg_release arch_atomic_xchg_release +#define arch_atomic64_xchg arch_atomic_xchg + +#define arch_atomic64_cmpxchg_relaxed arch_atomic_cmpxchg_relaxed +#define arch_atomic64_cmpxchg_acquire arch_atomic_cmpxchg_acquire +#define arch_atomic64_cmpxchg_release arch_atomic_cmpxchg_release +#define arch_atomic64_cmpxchg arch_atomic_cmpxchg + +#define arch_atomic64_andnot arch_atomic64_andnot + +#define arch_atomic64_dec_if_positive arch_atomic64_dec_if_positive + +#include <asm-generic/atomic-instrumented.h> #endif #endif diff --git a/arch/arm64/include/asm/atomic_ll_sc.h b/arch/arm64/include/asm/atomic_ll_sc.h index af7b99005453..e321293e0c89 100644 --- a/arch/arm64/include/asm/atomic_ll_sc.h +++ b/arch/arm64/include/asm/atomic_ll_sc.h @@ -39,7 +39,7 @@ #define ATOMIC_OP(op, asm_op) \ __LL_SC_INLINE void \ -__LL_SC_PREFIX(atomic_##op(int i, atomic_t *v)) \ +__LL_SC_PREFIX(arch_atomic_##op(int i, atomic_t *v)) \ { \ unsigned long tmp; \ int result; \ @@ -53,11 +53,11 @@ __LL_SC_PREFIX(atomic_##op(int i, atomic_t *v)) \ : "=&r" (result), "=&r" (tmp), "+Q" (v->counter) \ : "Ir" (i)); \ } \ -__LL_SC_EXPORT(atomic_##op); +__LL_SC_EXPORT(arch_atomic_##op); #define ATOMIC_OP_RETURN(name, mb, acq, rel, cl, op, asm_op) \ __LL_SC_INLINE int \ -__LL_SC_PREFIX(atomic_##op##_return##name(int i, atomic_t *v)) \ +__LL_SC_PREFIX(arch_atomic_##op##_return##name(int i, atomic_t *v)) \ { \ unsigned long tmp; \ int result; \ @@ -75,11 +75,11 @@ __LL_SC_PREFIX(atomic_##op##_return##name(int i, atomic_t *v)) \ \ return result; \ } \ -__LL_SC_EXPORT(atomic_##op##_return##name); +__LL_SC_EXPORT(arch_atomic_##op##_return##name); #define ATOMIC_FETCH_OP(name, mb, acq, rel, cl, op, asm_op) \ __LL_SC_INLINE int \ -__LL_SC_PREFIX(atomic_fetch_##op##name(int i, atomic_t *v)) \ +__LL_SC_PREFIX(arch_atomic_fetch_##op##name(int i, atomic_t *v)) \ { \ unsigned long tmp; \ int val, result; \ @@ -97,7 +97,7 @@ __LL_SC_PREFIX(atomic_fetch_##op##name(int i, atomic_t *v)) \ \ return result; \ } \ -__LL_SC_EXPORT(atomic_fetch_##op##name); +__LL_SC_EXPORT(arch_atomic_fetch_##op##name); #define ATOMIC_OPS(...) \ ATOMIC_OP(__VA_ARGS__) \ @@ -133,7 +133,7 @@ ATOMIC_OPS(xor, eor) #define ATOMIC64_OP(op, asm_op) \ __LL_SC_INLINE void \ -__LL_SC_PREFIX(atomic64_##op(long i, atomic64_t *v)) \ +__LL_SC_PREFIX(arch_atomic64_##op(long i, atomic64_t *v)) \ { \ long result; \ unsigned long tmp; \ @@ -147,11 +147,11 @@ __LL_SC_PREFIX(atomic64_##op(long i, atomic64_t *v)) \ : "=&r" (result), "=&r" (tmp), "+Q" (v->counter) \ : "Ir" (i)); \ } \ -__LL_SC_EXPORT(atomic64_##op); +__LL_SC_EXPORT(arch_atomic64_##op); #define ATOMIC64_OP_RETURN(name, mb, acq, rel, cl, op, asm_op) \ __LL_SC_INLINE long \ -__LL_SC_PREFIX(atomic64_##op##_return##name(long i, atomic64_t *v)) \ +__LL_SC_PREFIX(arch_atomic64_##op##_return##name(long i, atomic64_t *v))\ { \ long result; \ unsigned long tmp; \ @@ -169,11 +169,11 @@ __LL_SC_PREFIX(atomic64_##op##_return##name(long i, atomic64_t *v)) \ \ return result; \ } \ -__LL_SC_EXPORT(atomic64_##op##_return##name); +__LL_SC_EXPORT(arch_atomic64_##op##_return##name); #define ATOMIC64_FETCH_OP(name, mb, acq, rel, cl, op, asm_op) \ __LL_SC_INLINE long \ -__LL_SC_PREFIX(atomic64_fetch_##op##name(long i, atomic64_t *v)) \ +__LL_SC_PREFIX(arch_atomic64_fetch_##op##name(long i, atomic64_t *v)) \ { \ long result, val; \ unsigned long tmp; \ @@ -191,7 +191,7 @@ __LL_SC_PREFIX(atomic64_fetch_##op##name(long i, atomic64_t *v)) \ \ return result; \ } \ -__LL_SC_EXPORT(atomic64_fetch_##op##name); +__LL_SC_EXPORT(arch_atomic64_fetch_##op##name); #define ATOMIC64_OPS(...) \ ATOMIC64_OP(__VA_ARGS__) \ @@ -226,7 +226,7 @@ ATOMIC64_OPS(xor, eor) #undef ATOMIC64_OP __LL_SC_INLINE long -__LL_SC_PREFIX(atomic64_dec_if_positive(atomic64_t *v)) +__LL_SC_PREFIX(arch_atomic64_dec_if_positive(atomic64_t *v)) { long result; unsigned long tmp; @@ -246,7 +246,7 @@ __LL_SC_PREFIX(atomic64_dec_if_positive(atomic64_t *v)) return result; } -__LL_SC_EXPORT(atomic64_dec_if_positive); +__LL_SC_EXPORT(arch_atomic64_dec_if_positive); #define __CMPXCHG_CASE(w, sfx, name, sz, mb, acq, rel, cl) \ __LL_SC_INLINE u##sz \ diff --git a/arch/arm64/include/asm/atomic_lse.h b/arch/arm64/include/asm/atomic_lse.h index a424355240c5..9256a3921e4b 100644 --- a/arch/arm64/include/asm/atomic_lse.h +++ b/arch/arm64/include/asm/atomic_lse.h @@ -25,9 +25,9 @@ #error "please don't include this file directly" #endif -#define __LL_SC_ATOMIC(op) __LL_SC_CALL(atomic_##op) +#define __LL_SC_ATOMIC(op) __LL_SC_CALL(arch_atomic_##op) #define ATOMIC_OP(op, asm_op) \ -static inline void atomic_##op(int i, atomic_t *v) \ +static inline void arch_atomic_##op(int i, atomic_t *v) \ { \ register int w0 asm ("w0") = i; \ register atomic_t *x1 asm ("x1") = v; \ @@ -47,7 +47,7 @@ ATOMIC_OP(add, stadd) #undef ATOMIC_OP #define ATOMIC_FETCH_OP(name, mb, op, asm_op, cl...) \ -static inline int atomic_fetch_##op##name(int i, atomic_t *v) \ +static inline int arch_atomic_fetch_##op##name(int i, atomic_t *v) \ { \ register int w0 asm ("w0") = i; \ register atomic_t *x1 asm ("x1") = v; \ @@ -79,7 +79,7 @@ ATOMIC_FETCH_OPS(add, ldadd) #undef ATOMIC_FETCH_OPS #define ATOMIC_OP_ADD_RETURN(name, mb, cl...) \ -static inline int atomic_add_return##name(int i, atomic_t *v) \ +static inline int arch_atomic_add_return##name(int i, atomic_t *v) \ { \ register int w0 asm ("w0") = i; \ register atomic_t *x1 asm ("x1") = v; \ @@ -105,7 +105,7 @@ ATOMIC_OP_ADD_RETURN( , al, "memory") #undef ATOMIC_OP_ADD_RETURN -static inline void atomic_and(int i, atomic_t *v) +static inline void arch_atomic_and(int i, atomic_t *v) { register int w0 asm ("w0") = i; register atomic_t *x1 asm ("x1") = v; @@ -123,7 +123,7 @@ static inline void atomic_and(int i, atomic_t *v) } #define ATOMIC_FETCH_OP_AND(name, mb, cl...) \ -static inline int atomic_fetch_and##name(int i, atomic_t *v) \ +static inline int arch_atomic_fetch_and##name(int i, atomic_t *v) \ { \ register int w0 asm ("w0") = i; \ register atomic_t *x1 asm ("x1") = v; \ @@ -149,7 +149,7 @@ ATOMIC_FETCH_OP_AND( , al, "memory") #undef ATOMIC_FETCH_OP_AND -static inline void atomic_sub(int i, atomic_t *v) +static inline void arch_atomic_sub(int i, atomic_t *v) { register int w0 asm ("w0") = i; register atomic_t *x1 asm ("x1") = v; @@ -167,7 +167,7 @@ static inline void atomic_sub(int i, atomic_t *v) } #define ATOMIC_OP_SUB_RETURN(name, mb, cl...) \ -static inline int atomic_sub_return##name(int i, atomic_t *v) \ +static inline int arch_atomic_sub_return##name(int i, atomic_t *v) \ { \ register int w0 asm ("w0") = i; \ register atomic_t *x1 asm ("x1") = v; \ @@ -195,7 +195,7 @@ ATOMIC_OP_SUB_RETURN( , al, "memory") #undef ATOMIC_OP_SUB_RETURN #define ATOMIC_FETCH_OP_SUB(name, mb, cl...) \ -static inline int atomic_fetch_sub##name(int i, atomic_t *v) \ +static inline int arch_atomic_fetch_sub##name(int i, atomic_t *v) \ { \ register int w0 asm ("w0") = i; \ register atomic_t *x1 asm ("x1") = v; \ @@ -222,9 +222,9 @@ ATOMIC_FETCH_OP_SUB( , al, "memory") #undef ATOMIC_FETCH_OP_SUB #undef __LL_SC_ATOMIC -#define __LL_SC_ATOMIC64(op) __LL_SC_CALL(atomic64_##op) +#define __LL_SC_ATOMIC64(op) __LL_SC_CALL(arch_atomic64_##op) #define ATOMIC64_OP(op, asm_op) \ -static inline void atomic64_##op(long i, atomic64_t *v) \ +static inline void arch_atomic64_##op(long i, atomic64_t *v) \ { \ register long x0 asm ("x0") = i; \ register atomic64_t *x1 asm ("x1") = v; \ @@ -244,7 +244,7 @@ ATOMIC64_OP(add, stadd) #undef ATOMIC64_OP #define ATOMIC64_FETCH_OP(name, mb, op, asm_op, cl...) \ -static inline long atomic64_fetch_##op##name(long i, atomic64_t *v) \ +static inline long arch_atomic64_fetch_##op##name(long i, atomic64_t *v)\ { \ register long x0 asm ("x0") = i; \ register atomic64_t *x1 asm ("x1") = v; \ @@ -276,7 +276,7 @@ ATOMIC64_FETCH_OPS(add, ldadd) #undef ATOMIC64_FETCH_OPS #define ATOMIC64_OP_ADD_RETURN(name, mb, cl...) \ -static inline long atomic64_add_return##name(long i, atomic64_t *v) \ +static inline long arch_atomic64_add_return##name(long i, atomic64_t *v)\ { \ register long x0 asm ("x0") = i; \ register atomic64_t *x1 asm ("x1") = v; \ @@ -302,7 +302,7 @@ ATOMIC64_OP_ADD_RETURN( , al, "memory") #undef ATOMIC64_OP_ADD_RETURN -static inline void atomic64_and(long i, atomic64_t *v) +static inline void arch_atomic64_and(long i, atomic64_t *v) { register long x0 asm ("x0") = i; register atomic64_t *x1 asm ("x1") = v; @@ -320,7 +320,7 @@ static inline void atomic64_and(long i, atomic64_t *v) } #define ATOMIC64_FETCH_OP_AND(name, mb, cl...) \ -static inline long atomic64_fetch_and##name(long i, atomic64_t *v) \ +static inline long arch_atomic64_fetch_and##name(long i, atomic64_t *v) \ { \ register long x0 asm ("x0") = i; \ register atomic64_t *x1 asm ("x1") = v; \ @@ -346,7 +346,7 @@ ATOMIC64_FETCH_OP_AND( , al, "memory") #undef ATOMIC64_FETCH_OP_AND -static inline void atomic64_sub(long i, atomic64_t *v) +static inline void arch_atomic64_sub(long i, atomic64_t *v) { register long x0 asm ("x0") = i; register atomic64_t *x1 asm ("x1") = v; @@ -364,7 +364,7 @@ static inline void atomic64_sub(long i, atomic64_t *v) } #define ATOMIC64_OP_SUB_RETURN(name, mb, cl...) \ -static inline long atomic64_sub_return##name(long i, atomic64_t *v) \ +static inline long arch_atomic64_sub_return##name(long i, atomic64_t *v)\ { \ register long x0 asm ("x0") = i; \ register atomic64_t *x1 asm ("x1") = v; \ @@ -392,7 +392,7 @@ ATOMIC64_OP_SUB_RETURN( , al, "memory") #undef ATOMIC64_OP_SUB_RETURN #define ATOMIC64_FETCH_OP_SUB(name, mb, cl...) \ -static inline long atomic64_fetch_sub##name(long i, atomic64_t *v) \ +static inline long arch_atomic64_fetch_sub##name(long i, atomic64_t *v) \ { \ register long x0 asm ("x0") = i; \ register atomic64_t *x1 asm ("x1") = v; \ @@ -418,7 +418,7 @@ ATOMIC64_FETCH_OP_SUB( , al, "memory") #undef ATOMIC64_FETCH_OP_SUB -static inline long atomic64_dec_if_positive(atomic64_t *v) +static inline long arch_atomic64_dec_if_positive(atomic64_t *v) { register long x0 asm ("x0") = (long)v; diff --git a/arch/arm64/include/asm/cmpxchg.h b/arch/arm64/include/asm/cmpxchg.h index 3f9376f1c409..e6ea0f42e097 100644 --- a/arch/arm64/include/asm/cmpxchg.h +++ b/arch/arm64/include/asm/cmpxchg.h @@ -110,10 +110,10 @@ __XCHG_GEN(_mb) }) /* xchg */ -#define xchg_relaxed(...) __xchg_wrapper( , __VA_ARGS__) -#define xchg_acquire(...) __xchg_wrapper(_acq, __VA_ARGS__) -#define xchg_release(...) __xchg_wrapper(_rel, __VA_ARGS__) -#define xchg(...) __xchg_wrapper( _mb, __VA_ARGS__) +#define arch_xchg_relaxed(...) __xchg_wrapper( , __VA_ARGS__) +#define arch_xchg_acquire(...) __xchg_wrapper(_acq, __VA_ARGS__) +#define arch_xchg_release(...) __xchg_wrapper(_rel, __VA_ARGS__) +#define arch_xchg(...) __xchg_wrapper( _mb, __VA_ARGS__) #define __CMPXCHG_GEN(sfx) \ static inline unsigned long __cmpxchg##sfx(volatile void *ptr, \ @@ -154,18 +154,18 @@ __CMPXCHG_GEN(_mb) }) /* cmpxchg */ -#define cmpxchg_relaxed(...) __cmpxchg_wrapper( , __VA_ARGS__) -#define cmpxchg_acquire(...) __cmpxchg_wrapper(_acq, __VA_ARGS__) -#define cmpxchg_release(...) __cmpxchg_wrapper(_rel, __VA_ARGS__) -#define cmpxchg(...) __cmpxchg_wrapper( _mb, __VA_ARGS__) -#define cmpxchg_local cmpxchg_relaxed +#define arch_cmpxchg_relaxed(...) __cmpxchg_wrapper( , __VA_ARGS__) +#define arch_cmpxchg_acquire(...) __cmpxchg_wrapper(_acq, __VA_ARGS__) +#define arch_cmpxchg_release(...) __cmpxchg_wrapper(_rel, __VA_ARGS__) +#define arch_cmpxchg(...) __cmpxchg_wrapper( _mb, __VA_ARGS__) +#define arch_cmpxchg_local arch_cmpxchg_relaxed /* cmpxchg64 */ -#define cmpxchg64_relaxed cmpxchg_relaxed -#define cmpxchg64_acquire cmpxchg_acquire -#define cmpxchg64_release cmpxchg_release -#define cmpxchg64 cmpxchg -#define cmpxchg64_local cmpxchg_local +#define arch_cmpxchg64_relaxed arch_cmpxchg_relaxed +#define arch_cmpxchg64_acquire arch_cmpxchg_acquire +#define arch_cmpxchg64_release arch_cmpxchg_release +#define arch_cmpxchg64 arch_cmpxchg +#define arch_cmpxchg64_local arch_cmpxchg_local /* cmpxchg_double */ #define system_has_cmpxchg_double() 1 @@ -177,24 +177,24 @@ __CMPXCHG_GEN(_mb) VM_BUG_ON((unsigned long *)(ptr2) - (unsigned long *)(ptr1) != 1); \ }) -#define cmpxchg_double(ptr1, ptr2, o1, o2, n1, n2) \ -({\ - int __ret;\ - __cmpxchg_double_check(ptr1, ptr2); \ - __ret = !__cmpxchg_double_mb((unsigned long)(o1), (unsigned long)(o2), \ - (unsigned long)(n1), (unsigned long)(n2), \ - ptr1); \ - __ret; \ +#define arch_cmpxchg_double(ptr1, ptr2, o1, o2, n1, n2) \ +({ \ + int __ret; \ + __cmpxchg_double_check(ptr1, ptr2); \ + __ret = !__cmpxchg_double_mb((unsigned long)(o1), (unsigned long)(o2), \ + (unsigned long)(n1), (unsigned long)(n2), \ + ptr1); \ + __ret; \ }) -#define cmpxchg_double_local(ptr1, ptr2, o1, o2, n1, n2) \ -({\ - int __ret;\ - __cmpxchg_double_check(ptr1, ptr2); \ - __ret = !__cmpxchg_double((unsigned long)(o1), (unsigned long)(o2), \ - (unsigned long)(n1), (unsigned long)(n2), \ - ptr1); \ - __ret; \ +#define arch_cmpxchg_double_local(ptr1, ptr2, o1, o2, n1, n2) \ +({ \ + int __ret; \ + __cmpxchg_double_check(ptr1, ptr2); \ + __ret = !__cmpxchg_double((unsigned long)(o1), (unsigned long)(o2), \ + (unsigned long)(n1), (unsigned long)(n2), \ + ptr1); \ + __ret; \ }) #define __CMPWAIT_CASE(w, sfx, sz) \ diff --git a/arch/arm64/include/asm/sync_bitops.h b/arch/arm64/include/asm/sync_bitops.h index eee31a9f72a5..e9c1a02c2154 100644 --- a/arch/arm64/include/asm/sync_bitops.h +++ b/arch/arm64/include/asm/sync_bitops.h @@ -15,13 +15,13 @@ * ops which are SMP safe even on a UP kernel. */ -#define sync_set_bit(nr, p) set_bit(nr, p) -#define sync_clear_bit(nr, p) clear_bit(nr, p) -#define sync_change_bit(nr, p) change_bit(nr, p) -#define sync_test_and_set_bit(nr, p) test_and_set_bit(nr, p) -#define sync_test_and_clear_bit(nr, p) test_and_clear_bit(nr, p) -#define sync_test_and_change_bit(nr, p) test_and_change_bit(nr, p) -#define sync_test_bit(nr, addr) test_bit(nr, addr) -#define sync_cmpxchg cmpxchg +#define sync_set_bit(nr, p) set_bit(nr, p) +#define sync_clear_bit(nr, p) clear_bit(nr, p) +#define sync_change_bit(nr, p) change_bit(nr, p) +#define sync_test_and_set_bit(nr, p) test_and_set_bit(nr, p) +#define sync_test_and_clear_bit(nr, p) test_and_clear_bit(nr, p) +#define sync_test_and_change_bit(nr, p) test_and_change_bit(nr, p) +#define sync_test_bit(nr, addr) test_bit(nr, addr) +#define arch_sync_cmpxchg arch_cmpxchg #endif diff --git a/arch/x86/include/asm/refcount.h b/arch/x86/include/asm/refcount.h index dbaed55c1c24..232f856e0db0 100644 --- a/arch/x86/include/asm/refcount.h +++ b/arch/x86/include/asm/refcount.h @@ -67,16 +67,30 @@ static __always_inline void refcount_dec(refcount_t *r) static __always_inline __must_check bool refcount_sub_and_test(unsigned int i, refcount_t *r) { - return GEN_BINARY_SUFFIXED_RMWcc(LOCK_PREFIX "subl", + bool ret = GEN_BINARY_SUFFIXED_RMWcc(LOCK_PREFIX "subl", REFCOUNT_CHECK_LT_ZERO, r->refs.counter, e, "er", i, "cx"); + + if (ret) { + smp_acquire__after_ctrl_dep(); + return true; + } + + return false; } static __always_inline __must_check bool refcount_dec_and_test(refcount_t *r) { - return GEN_UNARY_SUFFIXED_RMWcc(LOCK_PREFIX "decl", - REFCOUNT_CHECK_LT_ZERO, - r->refs.counter, e, "cx"); + bool ret = GEN_UNARY_SUFFIXED_RMWcc(LOCK_PREFIX "decl", + REFCOUNT_CHECK_LT_ZERO, + r->refs.counter, e, "cx"); + + if (ret) { + smp_acquire__after_ctrl_dep(); + return true; + } + + return false; } static __always_inline __must_check diff --git a/fs/locks.c b/fs/locks.c index ff6af2c32601..eaa1cfaf73b0 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -1058,7 +1058,7 @@ static int flock_lock_inode(struct inode *inode, struct file_lock *request) return -ENOMEM; } - percpu_down_read_preempt_disable(&file_rwsem); + percpu_down_read(&file_rwsem); spin_lock(&ctx->flc_lock); if (request->fl_flags & FL_ACCESS) goto find_conflict; @@ -1100,7 +1100,7 @@ find_conflict: out: spin_unlock(&ctx->flc_lock); - percpu_up_read_preempt_enable(&file_rwsem); + percpu_up_read(&file_rwsem); if (new_fl) locks_free_lock(new_fl); locks_dispose_list(&dispose); @@ -1138,7 +1138,7 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request, new_fl2 = locks_alloc_lock(); } - percpu_down_read_preempt_disable(&file_rwsem); + percpu_down_read(&file_rwsem); spin_lock(&ctx->flc_lock); /* * New lock request. Walk all POSIX locks and look for conflicts. If @@ -1312,7 +1312,7 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request, } out: spin_unlock(&ctx->flc_lock); - percpu_up_read_preempt_enable(&file_rwsem); + percpu_up_read(&file_rwsem); /* * Free any unused locks. */ @@ -1584,7 +1584,7 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type) return error; } - percpu_down_read_preempt_disable(&file_rwsem); + percpu_down_read(&file_rwsem); spin_lock(&ctx->flc_lock); time_out_leases(inode, &dispose); @@ -1636,13 +1636,13 @@ restart: locks_insert_block(fl, new_fl, leases_conflict); trace_break_lease_block(inode, new_fl); spin_unlock(&ctx->flc_lock); - percpu_up_read_preempt_enable(&file_rwsem); + percpu_up_read(&file_rwsem); locks_dispose_list(&dispose); error = wait_event_interruptible_timeout(new_fl->fl_wait, !new_fl->fl_blocker, break_time); - percpu_down_read_preempt_disable(&file_rwsem); + percpu_down_read(&file_rwsem); spin_lock(&ctx->flc_lock); trace_break_lease_unblock(inode, new_fl); locks_delete_block(new_fl); @@ -1659,7 +1659,7 @@ restart: } out: spin_unlock(&ctx->flc_lock); - percpu_up_read_preempt_enable(&file_rwsem); + percpu_up_read(&file_rwsem); locks_dispose_list(&dispose); locks_free_lock(new_fl); return error; @@ -1729,7 +1729,7 @@ int fcntl_getlease(struct file *filp) ctx = smp_load_acquire(&inode->i_flctx); if (ctx && !list_empty_careful(&ctx->flc_lease)) { - percpu_down_read_preempt_disable(&file_rwsem); + percpu_down_read(&file_rwsem); spin_lock(&ctx->flc_lock); time_out_leases(inode, &dispose); list_for_each_entry(fl, &ctx->flc_lease, fl_list) { @@ -1739,7 +1739,7 @@ int fcntl_getlease(struct file *filp) break; } spin_unlock(&ctx->flc_lock); - percpu_up_read_preempt_enable(&file_rwsem); + percpu_up_read(&file_rwsem); locks_dispose_list(&dispose); } @@ -1813,7 +1813,7 @@ generic_add_lease(struct file *filp, long arg, struct file_lock **flp, void **pr return -EINVAL; } - percpu_down_read_preempt_disable(&file_rwsem); + percpu_down_read(&file_rwsem); spin_lock(&ctx->flc_lock); time_out_leases(inode, &dispose); error = check_conflicting_open(dentry, arg, lease->fl_flags); @@ -1884,7 +1884,7 @@ out_setup: lease->fl_lmops->lm_setup(lease, priv); out: spin_unlock(&ctx->flc_lock); - percpu_up_read_preempt_enable(&file_rwsem); + percpu_up_read(&file_rwsem); locks_dispose_list(&dispose); if (is_deleg) inode_unlock(inode); @@ -1907,7 +1907,7 @@ static int generic_delete_lease(struct file *filp, void *owner) return error; } - percpu_down_read_preempt_disable(&file_rwsem); + percpu_down_read(&file_rwsem); spin_lock(&ctx->flc_lock); list_for_each_entry(fl, &ctx->flc_lease, fl_list) { if (fl->fl_file == filp && @@ -1920,7 +1920,7 @@ static int generic_delete_lease(struct file *filp, void *owner) if (victim) error = fl->fl_lmops->lm_change(victim, F_UNLCK, &dispose); spin_unlock(&ctx->flc_lock); - percpu_up_read_preempt_enable(&file_rwsem); + percpu_up_read(&file_rwsem); locks_dispose_list(&dispose); return error; } @@ -2643,13 +2643,13 @@ locks_remove_lease(struct file *filp, struct file_lock_context *ctx) if (list_empty(&ctx->flc_lease)) return; - percpu_down_read_preempt_disable(&file_rwsem); + percpu_down_read(&file_rwsem); spin_lock(&ctx->flc_lock); list_for_each_entry_safe(fl, tmp, &ctx->flc_lease, fl_list) if (filp == fl->fl_file) lease_modify(fl, F_UNLCK, &dispose); spin_unlock(&ctx->flc_lock); - percpu_up_read_preempt_enable(&file_rwsem); + percpu_up_read(&file_rwsem); locks_dispose_list(&dispose); } diff --git a/include/asm-generic/atomic-instrumented.h b/include/asm-generic/atomic-instrumented.h index 0d4b1d3dbc1e..e8730c6b9fe2 100644 --- a/include/asm-generic/atomic-instrumented.h +++ b/include/asm-generic/atomic-instrumented.h @@ -1,3 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 + +// Generated by scripts/atomic/gen-atomic-instrumented.sh +// DO NOT MODIFY THIS FILE DIRECTLY + /* * This file provides wrappers with KASAN instrumentation for atomic operations. * To use this functionality an arch's atomic.h file needs to define all @@ -9,459 +14,1775 @@ * arch_ variants (i.e. arch_atomic_read()/arch_atomic_cmpxchg()) to avoid * double instrumentation. */ - -#ifndef _LINUX_ATOMIC_INSTRUMENTED_H -#define _LINUX_ATOMIC_INSTRUMENTED_H +#ifndef _ASM_GENERIC_ATOMIC_INSTRUMENTED_H +#define _ASM_GENERIC_ATOMIC_INSTRUMENTED_H #include <linux/build_bug.h> #include <linux/kasan-checks.h> -static __always_inline int atomic_read(const atomic_t *v) +static inline int +atomic_read(const atomic_t *v) { kasan_check_read(v, sizeof(*v)); return arch_atomic_read(v); } +#define atomic_read atomic_read -static __always_inline s64 atomic64_read(const atomic64_t *v) +#if defined(arch_atomic_read_acquire) +static inline int +atomic_read_acquire(const atomic_t *v) { kasan_check_read(v, sizeof(*v)); - return arch_atomic64_read(v); + return arch_atomic_read_acquire(v); } +#define atomic_read_acquire atomic_read_acquire +#endif -static __always_inline void atomic_set(atomic_t *v, int i) +static inline void +atomic_set(atomic_t *v, int i) { kasan_check_write(v, sizeof(*v)); arch_atomic_set(v, i); } +#define atomic_set atomic_set -static __always_inline void atomic64_set(atomic64_t *v, s64 i) +#if defined(arch_atomic_set_release) +static inline void +atomic_set_release(atomic_t *v, int i) { kasan_check_write(v, sizeof(*v)); - arch_atomic64_set(v, i); + arch_atomic_set_release(v, i); } +#define atomic_set_release atomic_set_release +#endif -static __always_inline int atomic_xchg(atomic_t *v, int i) +static inline void +atomic_add(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_xchg(v, i); + arch_atomic_add(i, v); } +#define atomic_add atomic_add -static __always_inline s64 atomic64_xchg(atomic64_t *v, s64 i) +#if !defined(arch_atomic_add_return_relaxed) || defined(arch_atomic_add_return) +static inline int +atomic_add_return(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic64_xchg(v, i); + return arch_atomic_add_return(i, v); } +#define atomic_add_return atomic_add_return +#endif -static __always_inline int atomic_cmpxchg(atomic_t *v, int old, int new) +#if defined(arch_atomic_add_return_acquire) +static inline int +atomic_add_return_acquire(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_cmpxchg(v, old, new); + return arch_atomic_add_return_acquire(i, v); } +#define atomic_add_return_acquire atomic_add_return_acquire +#endif -static __always_inline s64 atomic64_cmpxchg(atomic64_t *v, s64 old, s64 new) +#if defined(arch_atomic_add_return_release) +static inline int +atomic_add_return_release(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic64_cmpxchg(v, old, new); + return arch_atomic_add_return_release(i, v); } +#define atomic_add_return_release atomic_add_return_release +#endif -#ifdef arch_atomic_try_cmpxchg -#define atomic_try_cmpxchg atomic_try_cmpxchg -static __always_inline bool atomic_try_cmpxchg(atomic_t *v, int *old, int new) +#if defined(arch_atomic_add_return_relaxed) +static inline int +atomic_add_return_relaxed(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - kasan_check_read(old, sizeof(*old)); - return arch_atomic_try_cmpxchg(v, old, new); + return arch_atomic_add_return_relaxed(i, v); } +#define atomic_add_return_relaxed atomic_add_return_relaxed #endif -#ifdef arch_atomic64_try_cmpxchg -#define atomic64_try_cmpxchg atomic64_try_cmpxchg -static __always_inline bool atomic64_try_cmpxchg(atomic64_t *v, s64 *old, s64 new) +#if !defined(arch_atomic_fetch_add_relaxed) || defined(arch_atomic_fetch_add) +static inline int +atomic_fetch_add(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - kasan_check_read(old, sizeof(*old)); - return arch_atomic64_try_cmpxchg(v, old, new); + return arch_atomic_fetch_add(i, v); } +#define atomic_fetch_add atomic_fetch_add #endif -#ifdef arch_atomic_fetch_add_unless -#define atomic_fetch_add_unless atomic_fetch_add_unless -static __always_inline int atomic_fetch_add_unless(atomic_t *v, int a, int u) +#if defined(arch_atomic_fetch_add_acquire) +static inline int +atomic_fetch_add_acquire(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_fetch_add_unless(v, a, u); + return arch_atomic_fetch_add_acquire(i, v); } +#define atomic_fetch_add_acquire atomic_fetch_add_acquire #endif -#ifdef arch_atomic64_fetch_add_unless -#define atomic64_fetch_add_unless atomic64_fetch_add_unless -static __always_inline s64 atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u) +#if defined(arch_atomic_fetch_add_release) +static inline int +atomic_fetch_add_release(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic64_fetch_add_unless(v, a, u); + return arch_atomic_fetch_add_release(i, v); } +#define atomic_fetch_add_release atomic_fetch_add_release #endif -#ifdef arch_atomic_inc -#define atomic_inc atomic_inc -static __always_inline void atomic_inc(atomic_t *v) +#if defined(arch_atomic_fetch_add_relaxed) +static inline int +atomic_fetch_add_relaxed(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_add_relaxed(i, v); +} +#define atomic_fetch_add_relaxed atomic_fetch_add_relaxed +#endif + +static inline void +atomic_sub(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + arch_atomic_sub(i, v); +} +#define atomic_sub atomic_sub + +#if !defined(arch_atomic_sub_return_relaxed) || defined(arch_atomic_sub_return) +static inline int +atomic_sub_return(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_sub_return(i, v); +} +#define atomic_sub_return atomic_sub_return +#endif + +#if defined(arch_atomic_sub_return_acquire) +static inline int +atomic_sub_return_acquire(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_sub_return_acquire(i, v); +} +#define atomic_sub_return_acquire atomic_sub_return_acquire +#endif + +#if defined(arch_atomic_sub_return_release) +static inline int +atomic_sub_return_release(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_sub_return_release(i, v); +} +#define atomic_sub_return_release atomic_sub_return_release +#endif + +#if defined(arch_atomic_sub_return_relaxed) +static inline int +atomic_sub_return_relaxed(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_sub_return_relaxed(i, v); +} +#define atomic_sub_return_relaxed atomic_sub_return_relaxed +#endif + +#if !defined(arch_atomic_fetch_sub_relaxed) || defined(arch_atomic_fetch_sub) +static inline int +atomic_fetch_sub(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_sub(i, v); +} +#define atomic_fetch_sub atomic_fetch_sub +#endif + +#if defined(arch_atomic_fetch_sub_acquire) +static inline int +atomic_fetch_sub_acquire(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_sub_acquire(i, v); +} +#define atomic_fetch_sub_acquire atomic_fetch_sub_acquire +#endif + +#if defined(arch_atomic_fetch_sub_release) +static inline int +atomic_fetch_sub_release(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_sub_release(i, v); +} +#define atomic_fetch_sub_release atomic_fetch_sub_release +#endif + +#if defined(arch_atomic_fetch_sub_relaxed) +static inline int +atomic_fetch_sub_relaxed(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_sub_relaxed(i, v); +} +#define atomic_fetch_sub_relaxed atomic_fetch_sub_relaxed +#endif + +#if defined(arch_atomic_inc) +static inline void +atomic_inc(atomic_t *v) { kasan_check_write(v, sizeof(*v)); arch_atomic_inc(v); } +#define atomic_inc atomic_inc #endif -#ifdef arch_atomic64_inc -#define atomic64_inc atomic64_inc -static __always_inline void atomic64_inc(atomic64_t *v) +#if defined(arch_atomic_inc_return) +static inline int +atomic_inc_return(atomic_t *v) { kasan_check_write(v, sizeof(*v)); - arch_atomic64_inc(v); + return arch_atomic_inc_return(v); } +#define atomic_inc_return atomic_inc_return #endif -#ifdef arch_atomic_dec -#define atomic_dec atomic_dec -static __always_inline void atomic_dec(atomic_t *v) +#if defined(arch_atomic_inc_return_acquire) +static inline int +atomic_inc_return_acquire(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_inc_return_acquire(v); +} +#define atomic_inc_return_acquire atomic_inc_return_acquire +#endif + +#if defined(arch_atomic_inc_return_release) +static inline int +atomic_inc_return_release(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_inc_return_release(v); +} +#define atomic_inc_return_release atomic_inc_return_release +#endif + +#if defined(arch_atomic_inc_return_relaxed) +static inline int +atomic_inc_return_relaxed(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_inc_return_relaxed(v); +} +#define atomic_inc_return_relaxed atomic_inc_return_relaxed +#endif + +#if defined(arch_atomic_fetch_inc) +static inline int +atomic_fetch_inc(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_inc(v); +} +#define atomic_fetch_inc atomic_fetch_inc +#endif + +#if defined(arch_atomic_fetch_inc_acquire) +static inline int +atomic_fetch_inc_acquire(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_inc_acquire(v); +} +#define atomic_fetch_inc_acquire atomic_fetch_inc_acquire +#endif + +#if defined(arch_atomic_fetch_inc_release) +static inline int +atomic_fetch_inc_release(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_inc_release(v); +} +#define atomic_fetch_inc_release atomic_fetch_inc_release +#endif + +#if defined(arch_atomic_fetch_inc_relaxed) +static inline int +atomic_fetch_inc_relaxed(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_inc_relaxed(v); +} +#define atomic_fetch_inc_relaxed atomic_fetch_inc_relaxed +#endif + +#if defined(arch_atomic_dec) +static inline void +atomic_dec(atomic_t *v) { kasan_check_write(v, sizeof(*v)); arch_atomic_dec(v); } +#define atomic_dec atomic_dec #endif -#ifdef atch_atomic64_dec -#define atomic64_dec -static __always_inline void atomic64_dec(atomic64_t *v) +#if defined(arch_atomic_dec_return) +static inline int +atomic_dec_return(atomic_t *v) { kasan_check_write(v, sizeof(*v)); - arch_atomic64_dec(v); + return arch_atomic_dec_return(v); } +#define atomic_dec_return atomic_dec_return #endif -static __always_inline void atomic_add(int i, atomic_t *v) +#if defined(arch_atomic_dec_return_acquire) +static inline int +atomic_dec_return_acquire(atomic_t *v) { kasan_check_write(v, sizeof(*v)); - arch_atomic_add(i, v); + return arch_atomic_dec_return_acquire(v); } +#define atomic_dec_return_acquire atomic_dec_return_acquire +#endif -static __always_inline void atomic64_add(s64 i, atomic64_t *v) +#if defined(arch_atomic_dec_return_release) +static inline int +atomic_dec_return_release(atomic_t *v) { kasan_check_write(v, sizeof(*v)); - arch_atomic64_add(i, v); + return arch_atomic_dec_return_release(v); } +#define atomic_dec_return_release atomic_dec_return_release +#endif -static __always_inline void atomic_sub(int i, atomic_t *v) +#if defined(arch_atomic_dec_return_relaxed) +static inline int +atomic_dec_return_relaxed(atomic_t *v) { kasan_check_write(v, sizeof(*v)); - arch_atomic_sub(i, v); + return arch_atomic_dec_return_relaxed(v); } +#define atomic_dec_return_relaxed atomic_dec_return_relaxed +#endif -static __always_inline void atomic64_sub(s64 i, atomic64_t *v) +#if defined(arch_atomic_fetch_dec) +static inline int +atomic_fetch_dec(atomic_t *v) { kasan_check_write(v, sizeof(*v)); - arch_atomic64_sub(i, v); + return arch_atomic_fetch_dec(v); } +#define atomic_fetch_dec atomic_fetch_dec +#endif -static __always_inline void atomic_and(int i, atomic_t *v) +#if defined(arch_atomic_fetch_dec_acquire) +static inline int +atomic_fetch_dec_acquire(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_dec_acquire(v); +} +#define atomic_fetch_dec_acquire atomic_fetch_dec_acquire +#endif + +#if defined(arch_atomic_fetch_dec_release) +static inline int +atomic_fetch_dec_release(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_dec_release(v); +} +#define atomic_fetch_dec_release atomic_fetch_dec_release +#endif + +#if defined(arch_atomic_fetch_dec_relaxed) +static inline int +atomic_fetch_dec_relaxed(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_dec_relaxed(v); +} +#define atomic_fetch_dec_relaxed atomic_fetch_dec_relaxed +#endif + +static inline void +atomic_and(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); arch_atomic_and(i, v); } +#define atomic_and atomic_and -static __always_inline void atomic64_and(s64 i, atomic64_t *v) +#if !defined(arch_atomic_fetch_and_relaxed) || defined(arch_atomic_fetch_and) +static inline int +atomic_fetch_and(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - arch_atomic64_and(i, v); + return arch_atomic_fetch_and(i, v); +} +#define atomic_fetch_and atomic_fetch_and +#endif + +#if defined(arch_atomic_fetch_and_acquire) +static inline int +atomic_fetch_and_acquire(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_and_acquire(i, v); +} +#define atomic_fetch_and_acquire atomic_fetch_and_acquire +#endif + +#if defined(arch_atomic_fetch_and_release) +static inline int +atomic_fetch_and_release(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_and_release(i, v); +} +#define atomic_fetch_and_release atomic_fetch_and_release +#endif + +#if defined(arch_atomic_fetch_and_relaxed) +static inline int +atomic_fetch_and_relaxed(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_and_relaxed(i, v); } +#define atomic_fetch_and_relaxed atomic_fetch_and_relaxed +#endif + +#if defined(arch_atomic_andnot) +static inline void +atomic_andnot(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + arch_atomic_andnot(i, v); +} +#define atomic_andnot atomic_andnot +#endif -static __always_inline void atomic_or(int i, atomic_t *v) +#if defined(arch_atomic_fetch_andnot) +static inline int +atomic_fetch_andnot(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_andnot(i, v); +} +#define atomic_fetch_andnot atomic_fetch_andnot +#endif + +#if defined(arch_atomic_fetch_andnot_acquire) +static inline int +atomic_fetch_andnot_acquire(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_andnot_acquire(i, v); +} +#define atomic_fetch_andnot_acquire atomic_fetch_andnot_acquire +#endif + +#if defined(arch_atomic_fetch_andnot_release) +static inline int +atomic_fetch_andnot_release(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_andnot_release(i, v); +} +#define atomic_fetch_andnot_release atomic_fetch_andnot_release +#endif + +#if defined(arch_atomic_fetch_andnot_relaxed) +static inline int +atomic_fetch_andnot_relaxed(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_andnot_relaxed(i, v); +} +#define atomic_fetch_andnot_relaxed atomic_fetch_andnot_relaxed +#endif + +static inline void +atomic_or(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); arch_atomic_or(i, v); } +#define atomic_or atomic_or -static __always_inline void atomic64_or(s64 i, atomic64_t *v) +#if !defined(arch_atomic_fetch_or_relaxed) || defined(arch_atomic_fetch_or) +static inline int +atomic_fetch_or(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - arch_atomic64_or(i, v); + return arch_atomic_fetch_or(i, v); +} +#define atomic_fetch_or atomic_fetch_or +#endif + +#if defined(arch_atomic_fetch_or_acquire) +static inline int +atomic_fetch_or_acquire(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_or_acquire(i, v); +} +#define atomic_fetch_or_acquire atomic_fetch_or_acquire +#endif + +#if defined(arch_atomic_fetch_or_release) +static inline int +atomic_fetch_or_release(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_or_release(i, v); +} +#define atomic_fetch_or_release atomic_fetch_or_release +#endif + +#if defined(arch_atomic_fetch_or_relaxed) +static inline int +atomic_fetch_or_relaxed(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_fetch_or_relaxed(i, v); } +#define atomic_fetch_or_relaxed atomic_fetch_or_relaxed +#endif -static __always_inline void atomic_xor(int i, atomic_t *v) +static inline void +atomic_xor(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); arch_atomic_xor(i, v); } +#define atomic_xor atomic_xor -static __always_inline void atomic64_xor(s64 i, atomic64_t *v) +#if !defined(arch_atomic_fetch_xor_relaxed) || defined(arch_atomic_fetch_xor) +static inline int +atomic_fetch_xor(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - arch_atomic64_xor(i, v); + return arch_atomic_fetch_xor(i, v); } +#define atomic_fetch_xor atomic_fetch_xor +#endif -#ifdef arch_atomic_inc_return -#define atomic_inc_return atomic_inc_return -static __always_inline int atomic_inc_return(atomic_t *v) +#if defined(arch_atomic_fetch_xor_acquire) +static inline int +atomic_fetch_xor_acquire(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_inc_return(v); + return arch_atomic_fetch_xor_acquire(i, v); } +#define atomic_fetch_xor_acquire atomic_fetch_xor_acquire #endif -#ifdef arch_atomic64_in_return -#define atomic64_inc_return atomic64_inc_return -static __always_inline s64 atomic64_inc_return(atomic64_t *v) +#if defined(arch_atomic_fetch_xor_release) +static inline int +atomic_fetch_xor_release(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic64_inc_return(v); + return arch_atomic_fetch_xor_release(i, v); } +#define atomic_fetch_xor_release atomic_fetch_xor_release #endif -#ifdef arch_atomic_dec_return -#define atomic_dec_return atomic_dec_return -static __always_inline int atomic_dec_return(atomic_t *v) +#if defined(arch_atomic_fetch_xor_relaxed) +static inline int +atomic_fetch_xor_relaxed(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_dec_return(v); + return arch_atomic_fetch_xor_relaxed(i, v); } +#define atomic_fetch_xor_relaxed atomic_fetch_xor_relaxed #endif -#ifdef arch_atomic64_dec_return -#define atomic64_dec_return atomic64_dec_return -static __always_inline s64 atomic64_dec_return(atomic64_t *v) +#if !defined(arch_atomic_xchg_relaxed) || defined(arch_atomic_xchg) +static inline int +atomic_xchg(atomic_t *v, int i) { kasan_check_write(v, sizeof(*v)); - return arch_atomic64_dec_return(v); + return arch_atomic_xchg(v, i); } +#define atomic_xchg atomic_xchg #endif -#ifdef arch_atomic64_inc_not_zero -#define atomic64_inc_not_zero atomic64_inc_not_zero -static __always_inline bool atomic64_inc_not_zero(atomic64_t *v) +#if defined(arch_atomic_xchg_acquire) +static inline int +atomic_xchg_acquire(atomic_t *v, int i) { kasan_check_write(v, sizeof(*v)); - return arch_atomic64_inc_not_zero(v); + return arch_atomic_xchg_acquire(v, i); } +#define atomic_xchg_acquire atomic_xchg_acquire #endif -#ifdef arch_atomic64_dec_if_positive -#define atomic64_dec_if_positive atomic64_dec_if_positive -static __always_inline s64 atomic64_dec_if_positive(atomic64_t *v) +#if defined(arch_atomic_xchg_release) +static inline int +atomic_xchg_release(atomic_t *v, int i) { kasan_check_write(v, sizeof(*v)); - return arch_atomic64_dec_if_positive(v); + return arch_atomic_xchg_release(v, i); } +#define atomic_xchg_release atomic_xchg_release #endif -#ifdef arch_atomic_dec_and_test -#define atomic_dec_and_test atomic_dec_and_test -static __always_inline bool atomic_dec_and_test(atomic_t *v) +#if defined(arch_atomic_xchg_relaxed) +static inline int +atomic_xchg_relaxed(atomic_t *v, int i) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_dec_and_test(v); + return arch_atomic_xchg_relaxed(v, i); } +#define atomic_xchg_relaxed atomic_xchg_relaxed #endif -#ifdef arch_atomic64_dec_and_test -#define atomic64_dec_and_test atomic64_dec_and_test -static __always_inline bool atomic64_dec_and_test(atomic64_t *v) +#if !defined(arch_atomic_cmpxchg_relaxed) || defined(arch_atomic_cmpxchg) +static inline int +atomic_cmpxchg(atomic_t *v, int old, int new) { kasan_check_write(v, sizeof(*v)); - return arch_atomic64_dec_and_test(v); + return arch_atomic_cmpxchg(v, old, new); } +#define atomic_cmpxchg atomic_cmpxchg #endif -#ifdef arch_atomic_inc_and_test -#define atomic_inc_and_test atomic_inc_and_test -static __always_inline bool atomic_inc_and_test(atomic_t *v) +#if defined(arch_atomic_cmpxchg_acquire) +static inline int +atomic_cmpxchg_acquire(atomic_t *v, int old, int new) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_cmpxchg_acquire(v, old, new); +} +#define atomic_cmpxchg_acquire atomic_cmpxchg_acquire +#endif + +#if defined(arch_atomic_cmpxchg_release) +static inline int +atomic_cmpxchg_release(atomic_t *v, int old, int new) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_cmpxchg_release(v, old, new); +} +#define atomic_cmpxchg_release atomic_cmpxchg_release +#endif + +#if defined(arch_atomic_cmpxchg_relaxed) +static inline int +atomic_cmpxchg_relaxed(atomic_t *v, int old, int new) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_cmpxchg_relaxed(v, old, new); +} +#define atomic_cmpxchg_relaxed atomic_cmpxchg_relaxed +#endif + +#if defined(arch_atomic_try_cmpxchg) +static inline bool +atomic_try_cmpxchg(atomic_t *v, int *old, int new) +{ + kasan_check_write(v, sizeof(*v)); + kasan_check_write(old, sizeof(*old)); + return arch_atomic_try_cmpxchg(v, old, new); +} +#define atomic_try_cmpxchg atomic_try_cmpxchg +#endif + +#if defined(arch_atomic_try_cmpxchg_acquire) +static inline bool +atomic_try_cmpxchg_acquire(atomic_t *v, int *old, int new) +{ + kasan_check_write(v, sizeof(*v)); + kasan_check_write(old, sizeof(*old)); + return arch_atomic_try_cmpxchg_acquire(v, old, new); +} +#define atomic_try_cmpxchg_acquire atomic_try_cmpxchg_acquire +#endif + +#if defined(arch_atomic_try_cmpxchg_release) +static inline bool +atomic_try_cmpxchg_release(atomic_t *v, int *old, int new) +{ + kasan_check_write(v, sizeof(*v)); + kasan_check_write(old, sizeof(*old)); + return arch_atomic_try_cmpxchg_release(v, old, new); +} +#define atomic_try_cmpxchg_release atomic_try_cmpxchg_release +#endif + +#if defined(arch_atomic_try_cmpxchg_relaxed) +static inline bool +atomic_try_cmpxchg_relaxed(atomic_t *v, int *old, int new) +{ + kasan_check_write(v, sizeof(*v)); + kasan_check_write(old, sizeof(*old)); + return arch_atomic_try_cmpxchg_relaxed(v, old, new); +} +#define atomic_try_cmpxchg_relaxed atomic_try_cmpxchg_relaxed +#endif + +#if defined(arch_atomic_sub_and_test) +static inline bool +atomic_sub_and_test(int i, atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_sub_and_test(i, v); +} +#define atomic_sub_and_test atomic_sub_and_test +#endif + +#if defined(arch_atomic_dec_and_test) +static inline bool +atomic_dec_and_test(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_dec_and_test(v); +} +#define atomic_dec_and_test atomic_dec_and_test +#endif + +#if defined(arch_atomic_inc_and_test) +static inline bool +atomic_inc_and_test(atomic_t *v) { kasan_check_write(v, sizeof(*v)); return arch_atomic_inc_and_test(v); } +#define atomic_inc_and_test atomic_inc_and_test #endif -#ifdef arch_atomic64_inc_and_test -#define atomic64_inc_and_test atomic64_inc_and_test -static __always_inline bool atomic64_inc_and_test(atomic64_t *v) +#if defined(arch_atomic_add_negative) +static inline bool +atomic_add_negative(int i, atomic_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic64_inc_and_test(v); + return arch_atomic_add_negative(i, v); } +#define atomic_add_negative atomic_add_negative #endif -static __always_inline int atomic_add_return(int i, atomic_t *v) +#if defined(arch_atomic_fetch_add_unless) +static inline int +atomic_fetch_add_unless(atomic_t *v, int a, int u) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_add_return(i, v); + return arch_atomic_fetch_add_unless(v, a, u); +} +#define atomic_fetch_add_unless atomic_fetch_add_unless +#endif + +#if defined(arch_atomic_add_unless) +static inline bool +atomic_add_unless(atomic_t *v, int a, int u) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_add_unless(v, a, u); +} +#define atomic_add_unless atomic_add_unless +#endif + +#if defined(arch_atomic_inc_not_zero) +static inline bool +atomic_inc_not_zero(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_inc_not_zero(v); +} +#define atomic_inc_not_zero atomic_inc_not_zero +#endif + +#if defined(arch_atomic_inc_unless_negative) +static inline bool +atomic_inc_unless_negative(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_inc_unless_negative(v); +} +#define atomic_inc_unless_negative atomic_inc_unless_negative +#endif + +#if defined(arch_atomic_dec_unless_positive) +static inline bool +atomic_dec_unless_positive(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_dec_unless_positive(v); +} +#define atomic_dec_unless_positive atomic_dec_unless_positive +#endif + +#if defined(arch_atomic_dec_if_positive) +static inline int +atomic_dec_if_positive(atomic_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic_dec_if_positive(v); +} +#define atomic_dec_if_positive atomic_dec_if_positive +#endif + +static inline s64 +atomic64_read(const atomic64_t *v) +{ + kasan_check_read(v, sizeof(*v)); + return arch_atomic64_read(v); +} +#define atomic64_read atomic64_read + +#if defined(arch_atomic64_read_acquire) +static inline s64 +atomic64_read_acquire(const atomic64_t *v) +{ + kasan_check_read(v, sizeof(*v)); + return arch_atomic64_read_acquire(v); +} +#define atomic64_read_acquire atomic64_read_acquire +#endif + +static inline void +atomic64_set(atomic64_t *v, s64 i) +{ + kasan_check_write(v, sizeof(*v)); + arch_atomic64_set(v, i); +} +#define atomic64_set atomic64_set + +#if defined(arch_atomic64_set_release) +static inline void +atomic64_set_release(atomic64_t *v, s64 i) +{ + kasan_check_write(v, sizeof(*v)); + arch_atomic64_set_release(v, i); } +#define atomic64_set_release atomic64_set_release +#endif -static __always_inline s64 atomic64_add_return(s64 i, atomic64_t *v) +static inline void +atomic64_add(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + arch_atomic64_add(i, v); +} +#define atomic64_add atomic64_add + +#if !defined(arch_atomic64_add_return_relaxed) || defined(arch_atomic64_add_return) +static inline s64 +atomic64_add_return(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); return arch_atomic64_add_return(i, v); } +#define atomic64_add_return atomic64_add_return +#endif -static __always_inline int atomic_sub_return(int i, atomic_t *v) +#if defined(arch_atomic64_add_return_acquire) +static inline s64 +atomic64_add_return_acquire(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_sub_return(i, v); + return arch_atomic64_add_return_acquire(i, v); } +#define atomic64_add_return_acquire atomic64_add_return_acquire +#endif -static __always_inline s64 atomic64_sub_return(s64 i, atomic64_t *v) +#if defined(arch_atomic64_add_return_release) +static inline s64 +atomic64_add_return_release(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic64_sub_return(i, v); + return arch_atomic64_add_return_release(i, v); } +#define atomic64_add_return_release atomic64_add_return_release +#endif -static __always_inline int atomic_fetch_add(int i, atomic_t *v) +#if defined(arch_atomic64_add_return_relaxed) +static inline s64 +atomic64_add_return_relaxed(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_fetch_add(i, v); + return arch_atomic64_add_return_relaxed(i, v); } +#define atomic64_add_return_relaxed atomic64_add_return_relaxed +#endif -static __always_inline s64 atomic64_fetch_add(s64 i, atomic64_t *v) +#if !defined(arch_atomic64_fetch_add_relaxed) || defined(arch_atomic64_fetch_add) +static inline s64 +atomic64_fetch_add(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); return arch_atomic64_fetch_add(i, v); } +#define atomic64_fetch_add atomic64_fetch_add +#endif -static __always_inline int atomic_fetch_sub(int i, atomic_t *v) +#if defined(arch_atomic64_fetch_add_acquire) +static inline s64 +atomic64_fetch_add_acquire(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_fetch_sub(i, v); + return arch_atomic64_fetch_add_acquire(i, v); } +#define atomic64_fetch_add_acquire atomic64_fetch_add_acquire +#endif + +#if defined(arch_atomic64_fetch_add_release) +static inline s64 +atomic64_fetch_add_release(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_add_release(i, v); +} +#define atomic64_fetch_add_release atomic64_fetch_add_release +#endif -static __always_inline s64 atomic64_fetch_sub(s64 i, atomic64_t *v) +#if defined(arch_atomic64_fetch_add_relaxed) +static inline s64 +atomic64_fetch_add_relaxed(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_add_relaxed(i, v); +} +#define atomic64_fetch_add_relaxed atomic64_fetch_add_relaxed +#endif + +static inline void +atomic64_sub(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + arch_atomic64_sub(i, v); +} +#define atomic64_sub atomic64_sub + +#if !defined(arch_atomic64_sub_return_relaxed) || defined(arch_atomic64_sub_return) +static inline s64 +atomic64_sub_return(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_sub_return(i, v); +} +#define atomic64_sub_return atomic64_sub_return +#endif + +#if defined(arch_atomic64_sub_return_acquire) +static inline s64 +atomic64_sub_return_acquire(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_sub_return_acquire(i, v); +} +#define atomic64_sub_return_acquire atomic64_sub_return_acquire +#endif + +#if defined(arch_atomic64_sub_return_release) +static inline s64 +atomic64_sub_return_release(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_sub_return_release(i, v); +} +#define atomic64_sub_return_release atomic64_sub_return_release +#endif + +#if defined(arch_atomic64_sub_return_relaxed) +static inline s64 +atomic64_sub_return_relaxed(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_sub_return_relaxed(i, v); +} +#define atomic64_sub_return_relaxed atomic64_sub_return_relaxed +#endif + +#if !defined(arch_atomic64_fetch_sub_relaxed) || defined(arch_atomic64_fetch_sub) +static inline s64 +atomic64_fetch_sub(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); return arch_atomic64_fetch_sub(i, v); } +#define atomic64_fetch_sub atomic64_fetch_sub +#endif -static __always_inline int atomic_fetch_and(int i, atomic_t *v) +#if defined(arch_atomic64_fetch_sub_acquire) +static inline s64 +atomic64_fetch_sub_acquire(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_fetch_and(i, v); + return arch_atomic64_fetch_sub_acquire(i, v); +} +#define atomic64_fetch_sub_acquire atomic64_fetch_sub_acquire +#endif + +#if defined(arch_atomic64_fetch_sub_release) +static inline s64 +atomic64_fetch_sub_release(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_sub_release(i, v); } +#define atomic64_fetch_sub_release atomic64_fetch_sub_release +#endif -static __always_inline s64 atomic64_fetch_and(s64 i, atomic64_t *v) +#if defined(arch_atomic64_fetch_sub_relaxed) +static inline s64 +atomic64_fetch_sub_relaxed(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_sub_relaxed(i, v); +} +#define atomic64_fetch_sub_relaxed atomic64_fetch_sub_relaxed +#endif + +#if defined(arch_atomic64_inc) +static inline void +atomic64_inc(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + arch_atomic64_inc(v); +} +#define atomic64_inc atomic64_inc +#endif + +#if defined(arch_atomic64_inc_return) +static inline s64 +atomic64_inc_return(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_inc_return(v); +} +#define atomic64_inc_return atomic64_inc_return +#endif + +#if defined(arch_atomic64_inc_return_acquire) +static inline s64 +atomic64_inc_return_acquire(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_inc_return_acquire(v); +} +#define atomic64_inc_return_acquire atomic64_inc_return_acquire +#endif + +#if defined(arch_atomic64_inc_return_release) +static inline s64 +atomic64_inc_return_release(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_inc_return_release(v); +} +#define atomic64_inc_return_release atomic64_inc_return_release +#endif + +#if defined(arch_atomic64_inc_return_relaxed) +static inline s64 +atomic64_inc_return_relaxed(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_inc_return_relaxed(v); +} +#define atomic64_inc_return_relaxed atomic64_inc_return_relaxed +#endif + +#if defined(arch_atomic64_fetch_inc) +static inline s64 +atomic64_fetch_inc(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_inc(v); +} +#define atomic64_fetch_inc atomic64_fetch_inc +#endif + +#if defined(arch_atomic64_fetch_inc_acquire) +static inline s64 +atomic64_fetch_inc_acquire(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_inc_acquire(v); +} +#define atomic64_fetch_inc_acquire atomic64_fetch_inc_acquire +#endif + +#if defined(arch_atomic64_fetch_inc_release) +static inline s64 +atomic64_fetch_inc_release(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_inc_release(v); +} +#define atomic64_fetch_inc_release atomic64_fetch_inc_release +#endif + +#if defined(arch_atomic64_fetch_inc_relaxed) +static inline s64 +atomic64_fetch_inc_relaxed(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_inc_relaxed(v); +} +#define atomic64_fetch_inc_relaxed atomic64_fetch_inc_relaxed +#endif + +#if defined(arch_atomic64_dec) +static inline void +atomic64_dec(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + arch_atomic64_dec(v); +} +#define atomic64_dec atomic64_dec +#endif + +#if defined(arch_atomic64_dec_return) +static inline s64 +atomic64_dec_return(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_dec_return(v); +} +#define atomic64_dec_return atomic64_dec_return +#endif + +#if defined(arch_atomic64_dec_return_acquire) +static inline s64 +atomic64_dec_return_acquire(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_dec_return_acquire(v); +} +#define atomic64_dec_return_acquire atomic64_dec_return_acquire +#endif + +#if defined(arch_atomic64_dec_return_release) +static inline s64 +atomic64_dec_return_release(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_dec_return_release(v); +} +#define atomic64_dec_return_release atomic64_dec_return_release +#endif + +#if defined(arch_atomic64_dec_return_relaxed) +static inline s64 +atomic64_dec_return_relaxed(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_dec_return_relaxed(v); +} +#define atomic64_dec_return_relaxed atomic64_dec_return_relaxed +#endif + +#if defined(arch_atomic64_fetch_dec) +static inline s64 +atomic64_fetch_dec(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_dec(v); +} +#define atomic64_fetch_dec atomic64_fetch_dec +#endif + +#if defined(arch_atomic64_fetch_dec_acquire) +static inline s64 +atomic64_fetch_dec_acquire(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_dec_acquire(v); +} +#define atomic64_fetch_dec_acquire atomic64_fetch_dec_acquire +#endif + +#if defined(arch_atomic64_fetch_dec_release) +static inline s64 +atomic64_fetch_dec_release(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_dec_release(v); +} +#define atomic64_fetch_dec_release atomic64_fetch_dec_release +#endif + +#if defined(arch_atomic64_fetch_dec_relaxed) +static inline s64 +atomic64_fetch_dec_relaxed(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_dec_relaxed(v); +} +#define atomic64_fetch_dec_relaxed atomic64_fetch_dec_relaxed +#endif + +static inline void +atomic64_and(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + arch_atomic64_and(i, v); +} +#define atomic64_and atomic64_and + +#if !defined(arch_atomic64_fetch_and_relaxed) || defined(arch_atomic64_fetch_and) +static inline s64 +atomic64_fetch_and(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); return arch_atomic64_fetch_and(i, v); } +#define atomic64_fetch_and atomic64_fetch_and +#endif -static __always_inline int atomic_fetch_or(int i, atomic_t *v) +#if defined(arch_atomic64_fetch_and_acquire) +static inline s64 +atomic64_fetch_and_acquire(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_fetch_or(i, v); + return arch_atomic64_fetch_and_acquire(i, v); +} +#define atomic64_fetch_and_acquire atomic64_fetch_and_acquire +#endif + +#if defined(arch_atomic64_fetch_and_release) +static inline s64 +atomic64_fetch_and_release(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_and_release(i, v); +} +#define atomic64_fetch_and_release atomic64_fetch_and_release +#endif + +#if defined(arch_atomic64_fetch_and_relaxed) +static inline s64 +atomic64_fetch_and_relaxed(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_and_relaxed(i, v); +} +#define atomic64_fetch_and_relaxed atomic64_fetch_and_relaxed +#endif + +#if defined(arch_atomic64_andnot) +static inline void +atomic64_andnot(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + arch_atomic64_andnot(i, v); +} +#define atomic64_andnot atomic64_andnot +#endif + +#if defined(arch_atomic64_fetch_andnot) +static inline s64 +atomic64_fetch_andnot(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_andnot(i, v); +} +#define atomic64_fetch_andnot atomic64_fetch_andnot +#endif + +#if defined(arch_atomic64_fetch_andnot_acquire) +static inline s64 +atomic64_fetch_andnot_acquire(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_andnot_acquire(i, v); +} +#define atomic64_fetch_andnot_acquire atomic64_fetch_andnot_acquire +#endif + +#if defined(arch_atomic64_fetch_andnot_release) +static inline s64 +atomic64_fetch_andnot_release(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_andnot_release(i, v); +} +#define atomic64_fetch_andnot_release atomic64_fetch_andnot_release +#endif + +#if defined(arch_atomic64_fetch_andnot_relaxed) +static inline s64 +atomic64_fetch_andnot_relaxed(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_andnot_relaxed(i, v); +} +#define atomic64_fetch_andnot_relaxed atomic64_fetch_andnot_relaxed +#endif + +static inline void +atomic64_or(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + arch_atomic64_or(i, v); } +#define atomic64_or atomic64_or -static __always_inline s64 atomic64_fetch_or(s64 i, atomic64_t *v) +#if !defined(arch_atomic64_fetch_or_relaxed) || defined(arch_atomic64_fetch_or) +static inline s64 +atomic64_fetch_or(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); return arch_atomic64_fetch_or(i, v); } +#define atomic64_fetch_or atomic64_fetch_or +#endif -static __always_inline int atomic_fetch_xor(int i, atomic_t *v) +#if defined(arch_atomic64_fetch_or_acquire) +static inline s64 +atomic64_fetch_or_acquire(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_fetch_xor(i, v); + return arch_atomic64_fetch_or_acquire(i, v); +} +#define atomic64_fetch_or_acquire atomic64_fetch_or_acquire +#endif + +#if defined(arch_atomic64_fetch_or_release) +static inline s64 +atomic64_fetch_or_release(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_or_release(i, v); +} +#define atomic64_fetch_or_release atomic64_fetch_or_release +#endif + +#if defined(arch_atomic64_fetch_or_relaxed) +static inline s64 +atomic64_fetch_or_relaxed(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_or_relaxed(i, v); +} +#define atomic64_fetch_or_relaxed atomic64_fetch_or_relaxed +#endif + +static inline void +atomic64_xor(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + arch_atomic64_xor(i, v); } +#define atomic64_xor atomic64_xor -static __always_inline s64 atomic64_fetch_xor(s64 i, atomic64_t *v) +#if !defined(arch_atomic64_fetch_xor_relaxed) || defined(arch_atomic64_fetch_xor) +static inline s64 +atomic64_fetch_xor(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); return arch_atomic64_fetch_xor(i, v); } +#define atomic64_fetch_xor atomic64_fetch_xor +#endif -#ifdef arch_atomic_sub_and_test -#define atomic_sub_and_test atomic_sub_and_test -static __always_inline bool atomic_sub_and_test(int i, atomic_t *v) +#if defined(arch_atomic64_fetch_xor_acquire) +static inline s64 +atomic64_fetch_xor_acquire(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_sub_and_test(i, v); + return arch_atomic64_fetch_xor_acquire(i, v); } +#define atomic64_fetch_xor_acquire atomic64_fetch_xor_acquire #endif -#ifdef arch_atomic64_sub_and_test -#define atomic64_sub_and_test atomic64_sub_and_test -static __always_inline bool atomic64_sub_and_test(s64 i, atomic64_t *v) +#if defined(arch_atomic64_fetch_xor_release) +static inline s64 +atomic64_fetch_xor_release(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_xor_release(i, v); +} +#define atomic64_fetch_xor_release atomic64_fetch_xor_release +#endif + +#if defined(arch_atomic64_fetch_xor_relaxed) +static inline s64 +atomic64_fetch_xor_relaxed(s64 i, atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_xor_relaxed(i, v); +} +#define atomic64_fetch_xor_relaxed atomic64_fetch_xor_relaxed +#endif + +#if !defined(arch_atomic64_xchg_relaxed) || defined(arch_atomic64_xchg) +static inline s64 +atomic64_xchg(atomic64_t *v, s64 i) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_xchg(v, i); +} +#define atomic64_xchg atomic64_xchg +#endif + +#if defined(arch_atomic64_xchg_acquire) +static inline s64 +atomic64_xchg_acquire(atomic64_t *v, s64 i) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_xchg_acquire(v, i); +} +#define atomic64_xchg_acquire atomic64_xchg_acquire +#endif + +#if defined(arch_atomic64_xchg_release) +static inline s64 +atomic64_xchg_release(atomic64_t *v, s64 i) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_xchg_release(v, i); +} +#define atomic64_xchg_release atomic64_xchg_release +#endif + +#if defined(arch_atomic64_xchg_relaxed) +static inline s64 +atomic64_xchg_relaxed(atomic64_t *v, s64 i) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_xchg_relaxed(v, i); +} +#define atomic64_xchg_relaxed atomic64_xchg_relaxed +#endif + +#if !defined(arch_atomic64_cmpxchg_relaxed) || defined(arch_atomic64_cmpxchg) +static inline s64 +atomic64_cmpxchg(atomic64_t *v, s64 old, s64 new) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_cmpxchg(v, old, new); +} +#define atomic64_cmpxchg atomic64_cmpxchg +#endif + +#if defined(arch_atomic64_cmpxchg_acquire) +static inline s64 +atomic64_cmpxchg_acquire(atomic64_t *v, s64 old, s64 new) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_cmpxchg_acquire(v, old, new); +} +#define atomic64_cmpxchg_acquire atomic64_cmpxchg_acquire +#endif + +#if defined(arch_atomic64_cmpxchg_release) +static inline s64 +atomic64_cmpxchg_release(atomic64_t *v, s64 old, s64 new) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_cmpxchg_release(v, old, new); +} +#define atomic64_cmpxchg_release atomic64_cmpxchg_release +#endif + +#if defined(arch_atomic64_cmpxchg_relaxed) +static inline s64 +atomic64_cmpxchg_relaxed(atomic64_t *v, s64 old, s64 new) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_cmpxchg_relaxed(v, old, new); +} +#define atomic64_cmpxchg_relaxed atomic64_cmpxchg_relaxed +#endif + +#if defined(arch_atomic64_try_cmpxchg) +static inline bool +atomic64_try_cmpxchg(atomic64_t *v, s64 *old, s64 new) +{ + kasan_check_write(v, sizeof(*v)); + kasan_check_write(old, sizeof(*old)); + return arch_atomic64_try_cmpxchg(v, old, new); +} +#define atomic64_try_cmpxchg atomic64_try_cmpxchg +#endif + +#if defined(arch_atomic64_try_cmpxchg_acquire) +static inline bool +atomic64_try_cmpxchg_acquire(atomic64_t *v, s64 *old, s64 new) +{ + kasan_check_write(v, sizeof(*v)); + kasan_check_write(old, sizeof(*old)); + return arch_atomic64_try_cmpxchg_acquire(v, old, new); +} +#define atomic64_try_cmpxchg_acquire atomic64_try_cmpxchg_acquire +#endif + +#if defined(arch_atomic64_try_cmpxchg_release) +static inline bool +atomic64_try_cmpxchg_release(atomic64_t *v, s64 *old, s64 new) +{ + kasan_check_write(v, sizeof(*v)); + kasan_check_write(old, sizeof(*old)); + return arch_atomic64_try_cmpxchg_release(v, old, new); +} +#define atomic64_try_cmpxchg_release atomic64_try_cmpxchg_release +#endif + +#if defined(arch_atomic64_try_cmpxchg_relaxed) +static inline bool +atomic64_try_cmpxchg_relaxed(atomic64_t *v, s64 *old, s64 new) +{ + kasan_check_write(v, sizeof(*v)); + kasan_check_write(old, sizeof(*old)); + return arch_atomic64_try_cmpxchg_relaxed(v, old, new); +} +#define atomic64_try_cmpxchg_relaxed atomic64_try_cmpxchg_relaxed +#endif + +#if defined(arch_atomic64_sub_and_test) +static inline bool +atomic64_sub_and_test(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); return arch_atomic64_sub_and_test(i, v); } +#define atomic64_sub_and_test atomic64_sub_and_test #endif -#ifdef arch_atomic_add_negative -#define atomic_add_negative atomic_add_negative -static __always_inline bool atomic_add_negative(int i, atomic_t *v) +#if defined(arch_atomic64_dec_and_test) +static inline bool +atomic64_dec_and_test(atomic64_t *v) { kasan_check_write(v, sizeof(*v)); - return arch_atomic_add_negative(i, v); + return arch_atomic64_dec_and_test(v); } +#define atomic64_dec_and_test atomic64_dec_and_test #endif -#ifdef arch_atomic64_add_negative -#define atomic64_add_negative atomic64_add_negative -static __always_inline bool atomic64_add_negative(s64 i, atomic64_t *v) +#if defined(arch_atomic64_inc_and_test) +static inline bool +atomic64_inc_and_test(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_inc_and_test(v); +} +#define atomic64_inc_and_test atomic64_inc_and_test +#endif + +#if defined(arch_atomic64_add_negative) +static inline bool +atomic64_add_negative(s64 i, atomic64_t *v) { kasan_check_write(v, sizeof(*v)); return arch_atomic64_add_negative(i, v); } +#define atomic64_add_negative atomic64_add_negative +#endif + +#if defined(arch_atomic64_fetch_add_unless) +static inline s64 +atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_fetch_add_unless(v, a, u); +} +#define atomic64_fetch_add_unless atomic64_fetch_add_unless +#endif + +#if defined(arch_atomic64_add_unless) +static inline bool +atomic64_add_unless(atomic64_t *v, s64 a, s64 u) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_add_unless(v, a, u); +} +#define atomic64_add_unless atomic64_add_unless +#endif + +#if defined(arch_atomic64_inc_not_zero) +static inline bool +atomic64_inc_not_zero(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_inc_not_zero(v); +} +#define atomic64_inc_not_zero atomic64_inc_not_zero +#endif + +#if defined(arch_atomic64_inc_unless_negative) +static inline bool +atomic64_inc_unless_negative(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_inc_unless_negative(v); +} +#define atomic64_inc_unless_negative atomic64_inc_unless_negative +#endif + +#if defined(arch_atomic64_dec_unless_positive) +static inline bool +atomic64_dec_unless_positive(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_dec_unless_positive(v); +} +#define atomic64_dec_unless_positive atomic64_dec_unless_positive +#endif + +#if defined(arch_atomic64_dec_if_positive) +static inline s64 +atomic64_dec_if_positive(atomic64_t *v) +{ + kasan_check_write(v, sizeof(*v)); + return arch_atomic64_dec_if_positive(v); +} +#define atomic64_dec_if_positive atomic64_dec_if_positive +#endif + +#if !defined(arch_xchg_relaxed) || defined(arch_xchg) +#define xchg(ptr, ...) \ +({ \ + typeof(ptr) __ai_ptr = (ptr); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_xchg(__ai_ptr, __VA_ARGS__); \ +}) +#endif + +#if defined(arch_xchg_acquire) +#define xchg_acquire(ptr, ...) \ +({ \ + typeof(ptr) __ai_ptr = (ptr); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_xchg_acquire(__ai_ptr, __VA_ARGS__); \ +}) +#endif + +#if defined(arch_xchg_release) +#define xchg_release(ptr, ...) \ +({ \ + typeof(ptr) __ai_ptr = (ptr); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_xchg_release(__ai_ptr, __VA_ARGS__); \ +}) +#endif + +#if defined(arch_xchg_relaxed) +#define xchg_relaxed(ptr, ...) \ +({ \ + typeof(ptr) __ai_ptr = (ptr); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_xchg_relaxed(__ai_ptr, __VA_ARGS__); \ +}) +#endif + +#if !defined(arch_cmpxchg_relaxed) || defined(arch_cmpxchg) +#define cmpxchg(ptr, ...) \ +({ \ + typeof(ptr) __ai_ptr = (ptr); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_cmpxchg(__ai_ptr, __VA_ARGS__); \ +}) +#endif + +#if defined(arch_cmpxchg_acquire) +#define cmpxchg_acquire(ptr, ...) \ +({ \ + typeof(ptr) __ai_ptr = (ptr); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_cmpxchg_acquire(__ai_ptr, __VA_ARGS__); \ +}) +#endif + +#if defined(arch_cmpxchg_release) +#define cmpxchg_release(ptr, ...) \ +({ \ + typeof(ptr) __ai_ptr = (ptr); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_cmpxchg_release(__ai_ptr, __VA_ARGS__); \ +}) #endif -#define xchg(ptr, new) \ +#if defined(arch_cmpxchg_relaxed) +#define cmpxchg_relaxed(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ - arch_xchg(__ai_ptr, (new)); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_cmpxchg_relaxed(__ai_ptr, __VA_ARGS__); \ }) +#endif -#define cmpxchg(ptr, old, new) \ +#if !defined(arch_cmpxchg64_relaxed) || defined(arch_cmpxchg64) +#define cmpxchg64(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ - arch_cmpxchg(__ai_ptr, (old), (new)); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_cmpxchg64(__ai_ptr, __VA_ARGS__); \ }) +#endif -#define sync_cmpxchg(ptr, old, new) \ +#if defined(arch_cmpxchg64_acquire) +#define cmpxchg64_acquire(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ - arch_sync_cmpxchg(__ai_ptr, (old), (new)); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_cmpxchg64_acquire(__ai_ptr, __VA_ARGS__); \ }) +#endif -#define cmpxchg_local(ptr, old, new) \ +#if defined(arch_cmpxchg64_release) +#define cmpxchg64_release(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ - arch_cmpxchg_local(__ai_ptr, (old), (new)); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_cmpxchg64_release(__ai_ptr, __VA_ARGS__); \ }) +#endif -#define cmpxchg64(ptr, old, new) \ +#if defined(arch_cmpxchg64_relaxed) +#define cmpxchg64_relaxed(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ - arch_cmpxchg64(__ai_ptr, (old), (new)); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_cmpxchg64_relaxed(__ai_ptr, __VA_ARGS__); \ }) +#endif -#define cmpxchg64_local(ptr, old, new) \ +#define cmpxchg_local(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ - arch_cmpxchg64_local(__ai_ptr, (old), (new)); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_cmpxchg_local(__ai_ptr, __VA_ARGS__); \ }) -#define cmpxchg_double(p1, p2, o1, o2, n1, n2) \ +#define cmpxchg64_local(ptr, ...) \ ({ \ - typeof(p1) __ai_p1 = (p1); \ - kasan_check_write(__ai_p1, 2 * sizeof(*__ai_p1)); \ - arch_cmpxchg_double(__ai_p1, (p2), (o1), (o2), (n1), (n2)); \ + typeof(ptr) __ai_ptr = (ptr); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_cmpxchg64_local(__ai_ptr, __VA_ARGS__); \ }) -#define cmpxchg_double_local(p1, p2, o1, o2, n1, n2) \ -({ \ - typeof(p1) __ai_p1 = (p1); \ - kasan_check_write(__ai_p1, 2 * sizeof(*__ai_p1)); \ - arch_cmpxchg_double_local(__ai_p1, (p2), (o1), (o2), (n1), (n2)); \ +#define sync_cmpxchg(ptr, ...) \ +({ \ + typeof(ptr) __ai_ptr = (ptr); \ + kasan_check_write(__ai_ptr, sizeof(*__ai_ptr)); \ + arch_sync_cmpxchg(__ai_ptr, __VA_ARGS__); \ +}) + +#define cmpxchg_double(ptr, ...) \ +({ \ + typeof(ptr) __ai_ptr = (ptr); \ + kasan_check_write(__ai_ptr, 2 * sizeof(*__ai_ptr)); \ + arch_cmpxchg_double(__ai_ptr, __VA_ARGS__); \ +}) + + +#define cmpxchg_double_local(ptr, ...) \ +({ \ + typeof(ptr) __ai_ptr = (ptr); \ + kasan_check_write(__ai_ptr, 2 * sizeof(*__ai_ptr)); \ + arch_cmpxchg_double_local(__ai_ptr, __VA_ARGS__); \ }) -#endif /* _LINUX_ATOMIC_INSTRUMENTED_H */ +#endif /* _ASM_GENERIC_ATOMIC_INSTRUMENTED_H */ +// b29b625d5de9280f680e42c7be859b55b15e5f6a diff --git a/include/asm-generic/atomic-long.h b/include/asm-generic/atomic-long.h index 87d14476edc2..881c7e27af28 100644 --- a/include/asm-generic/atomic-long.h +++ b/include/asm-generic/atomic-long.h @@ -1,269 +1,1013 @@ -/* SPDX-License-Identifier: GPL-2.0 */ +// SPDX-License-Identifier: GPL-2.0 + +// Generated by scripts/atomic/gen-atomic-long.sh +// DO NOT MODIFY THIS FILE DIRECTLY + #ifndef _ASM_GENERIC_ATOMIC_LONG_H #define _ASM_GENERIC_ATOMIC_LONG_H -/* - * Copyright (C) 2005 Silicon Graphics, Inc. - * Christoph Lameter - * - * Allows to provide arch independent atomic definitions without the need to - * edit all arch specific atomic.h files. - */ #include <asm/types.h> -/* - * Suppport for atomic_long_t - * - * Casts for parameters are avoided for existing atomic functions in order to - * avoid issues with cast-as-lval under gcc 4.x and other limitations that the - * macros of a platform may have. - */ +#ifdef CONFIG_64BIT +typedef atomic64_t atomic_long_t; +#define ATOMIC_LONG_INIT(i) ATOMIC64_INIT(i) +#define atomic_long_cond_read_acquire atomic64_cond_read_acquire +#define atomic_long_cond_read_relaxed atomic64_cond_read_relaxed +#else +typedef atomic_t atomic_long_t; +#define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i) +#define atomic_long_cond_read_acquire atomic_cond_read_acquire +#define atomic_long_cond_read_relaxed atomic_cond_read_relaxed +#endif -#if BITS_PER_LONG == 64 +#ifdef CONFIG_64BIT -typedef atomic64_t atomic_long_t; +static inline long +atomic_long_read(const atomic_long_t *v) +{ + return atomic64_read(v); +} -#define ATOMIC_LONG_INIT(i) ATOMIC64_INIT(i) -#define ATOMIC_LONG_PFX(x) atomic64 ## x -#define ATOMIC_LONG_TYPE s64 +static inline long +atomic_long_read_acquire(const atomic_long_t *v) +{ + return atomic64_read_acquire(v); +} -#else +static inline void +atomic_long_set(atomic_long_t *v, long i) +{ + atomic64_set(v, i); +} -typedef atomic_t atomic_long_t; +static inline void +atomic_long_set_release(atomic_long_t *v, long i) +{ + atomic64_set_release(v, i); +} -#define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i) -#define ATOMIC_LONG_PFX(x) atomic ## x -#define ATOMIC_LONG_TYPE int +static inline void +atomic_long_add(long i, atomic_long_t *v) +{ + atomic64_add(i, v); +} -#endif +static inline long +atomic_long_add_return(long i, atomic_long_t *v) +{ + return atomic64_add_return(i, v); +} + +static inline long +atomic_long_add_return_acquire(long i, atomic_long_t *v) +{ + return atomic64_add_return_acquire(i, v); +} + +static inline long +atomic_long_add_return_release(long i, atomic_long_t *v) +{ + return atomic64_add_return_release(i, v); +} + +static inline long +atomic_long_add_return_relaxed(long i, atomic_long_t *v) +{ + return atomic64_add_return_relaxed(i, v); +} + +static inline long +atomic_long_fetch_add(long i, atomic_long_t *v) +{ + return atomic64_fetch_add(i, v); +} + +static inline long +atomic_long_fetch_add_acquire(long i, atomic_long_t *v) +{ + return atomic64_fetch_add_acquire(i, v); +} + +static inline long +atomic_long_fetch_add_release(long i, atomic_long_t *v) +{ + return atomic64_fetch_add_release(i, v); +} + +static inline long +atomic_long_fetch_add_relaxed(long i, atomic_long_t *v) +{ + return atomic64_fetch_add_relaxed(i, v); +} + +static inline void +atomic_long_sub(long i, atomic_long_t *v) +{ + atomic64_sub(i, v); +} + +static inline long +atomic_long_sub_return(long i, atomic_long_t *v) +{ + return atomic64_sub_return(i, v); +} + +static inline long +atomic_long_sub_return_acquire(long i, atomic_long_t *v) +{ + return atomic64_sub_return_acquire(i, v); +} + +static inline long +atomic_long_sub_return_release(long i, atomic_long_t *v) +{ + return atomic64_sub_return_release(i, v); +} + +static inline long +atomic_long_sub_return_relaxed(long i, atomic_long_t *v) +{ + return atomic64_sub_return_relaxed(i, v); +} + +static inline long +atomic_long_fetch_sub(long i, atomic_long_t *v) +{ + return atomic64_fetch_sub(i, v); +} + +static inline long +atomic_long_fetch_sub_acquire(long i, atomic_long_t *v) +{ + return atomic64_fetch_sub_acquire(i, v); +} + +static inline long +atomic_long_fetch_sub_release(long i, atomic_long_t *v) +{ + return atomic64_fetch_sub_release(i, v); +} + +static inline long +atomic_long_fetch_sub_relaxed(long i, atomic_long_t *v) +{ + return atomic64_fetch_sub_relaxed(i, v); +} + +static inline void +atomic_long_inc(atomic_long_t *v) +{ + atomic64_inc(v); +} + +static inline long +atomic_long_inc_return(atomic_long_t *v) +{ + return atomic64_inc_return(v); +} + +static inline long +atomic_long_inc_return_acquire(atomic_long_t *v) +{ + return atomic64_inc_return_acquire(v); +} + +static inline long +atomic_long_inc_return_release(atomic_long_t *v) +{ + return atomic64_inc_return_release(v); +} + +static inline long +atomic_long_inc_return_relaxed(atomic_long_t *v) +{ + return atomic64_inc_return_relaxed(v); +} + +static inline long +atomic_long_fetch_inc(atomic_long_t *v) +{ + return atomic64_fetch_inc(v); +} + +static inline long +atomic_long_fetch_inc_acquire(atomic_long_t *v) +{ + return atomic64_fetch_inc_acquire(v); +} + +static inline long +atomic_long_fetch_inc_release(atomic_long_t *v) +{ + return atomic64_fetch_inc_release(v); +} + +static inline long +atomic_long_fetch_inc_relaxed(atomic_long_t *v) +{ + return atomic64_fetch_inc_relaxed(v); +} + +static inline void +atomic_long_dec(atomic_long_t *v) +{ + atomic64_dec(v); +} + +static inline long +atomic_long_dec_return(atomic_long_t *v) +{ + return atomic64_dec_return(v); +} + +static inline long +atomic_long_dec_return_acquire(atomic_long_t *v) +{ + return atomic64_dec_return_acquire(v); +} + +static inline long +atomic_long_dec_return_release(atomic_long_t *v) +{ + return atomic64_dec_return_release(v); +} + +static inline long +atomic_long_dec_return_relaxed(atomic_long_t *v) +{ + return atomic64_dec_return_relaxed(v); +} + +static inline long +atomic_long_fetch_dec(atomic_long_t *v) +{ + return atomic64_fetch_dec(v); +} + +static inline long +atomic_long_fetch_dec_acquire(atomic_long_t *v) +{ + return atomic64_fetch_dec_acquire(v); +} + +static inline long +atomic_long_fetch_dec_release(atomic_long_t *v) +{ + return atomic64_fetch_dec_release(v); +} + +static inline long +atomic_long_fetch_dec_relaxed(atomic_long_t *v) +{ + return atomic64_fetch_dec_relaxed(v); +} + +static inline void +atomic_long_and(long i, atomic_long_t *v) +{ + atomic64_and(i, v); +} + +static inline long +atomic_long_fetch_and(long i, atomic_long_t *v) +{ + return atomic64_fetch_and(i, v); +} + +static inline long +atomic_long_fetch_and_acquire(long i, atomic_long_t *v) +{ + return atomic64_fetch_and_acquire(i, v); +} + +static inline long +atomic_long_fetch_and_release(long i, atomic_long_t *v) +{ + return atomic64_fetch_and_release(i, v); +} + +static inline long +atomic_long_fetch_and_relaxed(long i, atomic_long_t *v) +{ + return atomic64_fetch_and_relaxed(i, v); +} + +static inline void +atomic_long_andnot(long i, atomic_long_t *v) +{ + atomic64_andnot(i, v); +} + +static inline long +atomic_long_fetch_andnot(long i, atomic_long_t *v) +{ + return atomic64_fetch_andnot(i, v); +} + +static inline long +atomic_long_fetch_andnot_acquire(long i, atomic_long_t *v) +{ + return atomic64_fetch_andnot_acquire(i, v); +} + +static inline long +atomic_long_fetch_andnot_release(long i, atomic_long_t *v) +{ + return atomic64_fetch_andnot_release(i, v); +} + +static inline long +atomic_long_fetch_andnot_relaxed(long i, atomic_long_t *v) +{ + return atomic64_fetch_andnot_relaxed(i, v); +} + +static inline void +atomic_long_or(long i, atomic_long_t *v) +{ + atomic64_or(i, v); +} + +static inline long +atomic_long_fetch_or(long i, atomic_long_t *v) +{ + return atomic64_fetch_or(i, v); +} + +static inline long +atomic_long_fetch_or_acquire(long i, atomic_long_t *v) +{ + return atomic64_fetch_or_acquire(i, v); +} + +static inline long +atomic_long_fetch_or_release(long i, atomic_long_t *v) +{ + return atomic64_fetch_or_release(i, v); +} + +static inline long +atomic_long_fetch_or_relaxed(long i, atomic_long_t *v) +{ + return atomic64_fetch_or_relaxed(i, v); +} + +static inline void +atomic_long_xor(long i, atomic_long_t *v) +{ + atomic64_xor(i, v); +} + +static inline long +atomic_long_fetch_xor(long i, atomic_long_t *v) +{ + return atomic64_fetch_xor(i, v); +} + +static inline long +atomic_long_fetch_xor_acquire(long i, atomic_long_t *v) +{ + return atomic64_fetch_xor_acquire(i, v); +} + +static inline long +atomic_long_fetch_xor_release(long i, atomic_long_t *v) +{ + return atomic64_fetch_xor_release(i, v); +} + +static inline long +atomic_long_fetch_xor_relaxed(long i, atomic_long_t *v) +{ + return atomic64_fetch_xor_relaxed(i, v); +} + +static inline long +atomic_long_xchg(atomic_long_t *v, long i) +{ + return atomic64_xchg(v, i); +} + +static inline long +atomic_long_xchg_acquire(atomic_long_t *v, long i) +{ + return atomic64_xchg_acquire(v, i); +} + +static inline long +atomic_long_xchg_release(atomic_long_t *v, long i) +{ + return atomic64_xchg_release(v, i); +} + +static inline long +atomic_long_xchg_relaxed(atomic_long_t *v, long i) +{ + return atomic64_xchg_relaxed(v, i); +} + +static inline long +atomic_long_cmpxchg(atomic_long_t *v, long old, long new) +{ + return atomic64_cmpxchg(v, old, new); +} + +static inline long +atomic_long_cmpxchg_acquire(atomic_long_t *v, long old, long new) +{ + return atomic64_cmpxchg_acquire(v, old, new); +} + +static inline long +atomic_long_cmpxchg_release(atomic_long_t *v, long old, long new) +{ + return atomic64_cmpxchg_release(v, old, new); +} + +static inline long +atomic_long_cmpxchg_relaxed(atomic_long_t *v, long old, long new) +{ + return atomic64_cmpxchg_relaxed(v, old, new); +} + +static inline bool +atomic_long_try_cmpxchg(atomic_long_t *v, long *old, long new) +{ + return atomic64_try_cmpxchg(v, (s64 *)old, new); +} + +static inline bool +atomic_long_try_cmpxchg_acquire(atomic_long_t *v, long *old, long new) +{ + return atomic64_try_cmpxchg_acquire(v, (s64 *)old, new); +} + +static inline bool +atomic_long_try_cmpxchg_release(atomic_long_t *v, long *old, long new) +{ + return atomic64_try_cmpxchg_release(v, (s64 *)old, new); +} + +static inline bool +atomic_long_try_cmpxchg_relaxed(atomic_long_t *v, long *old, long new) +{ + return atomic64_try_cmpxchg_relaxed(v, (s64 *)old, new); +} + +static inline bool +atomic_long_sub_and_test(long i, atomic_long_t *v) +{ + return atomic64_sub_and_test(i, v); +} + +static inline bool +atomic_long_dec_and_test(atomic_long_t *v) +{ + return atomic64_dec_and_test(v); +} + +static inline bool +atomic_long_inc_and_test(atomic_long_t *v) +{ + return atomic64_inc_and_test(v); +} + +static inline bool +atomic_long_add_negative(long i, atomic_long_t *v) +{ + return atomic64_add_negative(i, v); +} + +static inline long +atomic_long_fetch_add_unless(atomic_long_t *v, long a, long u) +{ + return atomic64_fetch_add_unless(v, a, u); +} + +static inline bool +atomic_long_add_unless(atomic_long_t *v, long a, long u) +{ + return atomic64_add_unless(v, a, u); +} + +static inline bool +atomic_long_inc_not_zero(atomic_long_t *v) +{ + return atomic64_inc_not_zero(v); +} + +static inline bool +atomic_long_inc_unless_negative(atomic_long_t *v) +{ + return atomic64_inc_unless_negative(v); +} + +static inline bool +atomic_long_dec_unless_positive(atomic_long_t *v) +{ + return atomic64_dec_unless_positive(v); +} + +static inline long +atomic_long_dec_if_positive(atomic_long_t *v) +{ + return atomic64_dec_if_positive(v); +} + +#else /* CONFIG_64BIT */ + +static inline long +atomic_long_read(const atomic_long_t *v) +{ + return atomic_read(v); +} + +static inline long +atomic_long_read_acquire(const atomic_long_t *v) +{ + return atomic_read_acquire(v); +} + +static inline void +atomic_long_set(atomic_long_t *v, long i) +{ + atomic_set(v, i); +} + +static inline void +atomic_long_set_release(atomic_long_t *v, long i) +{ + atomic_set_release(v, i); +} + +static inline void +atomic_long_add(long i, atomic_long_t *v) +{ + atomic_add(i, v); +} + +static inline long +atomic_long_add_return(long i, atomic_long_t *v) +{ + return atomic_add_return(i, v); +} + +static inline long +atomic_long_add_return_acquire(long i, atomic_long_t *v) +{ + return atomic_add_return_acquire(i, v); +} + +static inline long +atomic_long_add_return_release(long i, atomic_long_t *v) +{ + return atomic_add_return_release(i, v); +} + +static inline long +atomic_long_add_return_relaxed(long i, atomic_long_t *v) +{ + return atomic_add_return_relaxed(i, v); +} + +static inline long +atomic_long_fetch_add(long i, atomic_long_t *v) +{ + return atomic_fetch_add(i, v); +} + +static inline long +atomic_long_fetch_add_acquire(long i, atomic_long_t *v) +{ + return atomic_fetch_add_acquire(i, v); +} + +static inline long +atomic_long_fetch_add_release(long i, atomic_long_t *v) +{ + return atomic_fetch_add_release(i, v); +} + +static inline long +atomic_long_fetch_add_relaxed(long i, atomic_long_t *v) +{ + return atomic_fetch_add_relaxed(i, v); +} + +static inline void +atomic_long_sub(long i, atomic_long_t *v) +{ + atomic_sub(i, v); +} + +static inline long +atomic_long_sub_return(long i, atomic_long_t *v) +{ + return atomic_sub_return(i, v); +} + +static inline long +atomic_long_sub_return_acquire(long i, atomic_long_t *v) +{ + return atomic_sub_return_acquire(i, v); +} + +static inline long +atomic_long_sub_return_release(long i, atomic_long_t *v) +{ + return atomic_sub_return_release(i, v); +} + +static inline long +atomic_long_sub_return_relaxed(long i, atomic_long_t *v) +{ + return atomic_sub_return_relaxed(i, v); +} + +static inline long +atomic_long_fetch_sub(long i, atomic_long_t *v) +{ + return atomic_fetch_sub(i, v); +} + +static inline long +atomic_long_fetch_sub_acquire(long i, atomic_long_t *v) +{ + return atomic_fetch_sub_acquire(i, v); +} + +static inline long +atomic_long_fetch_sub_release(long i, atomic_long_t *v) +{ + return atomic_fetch_sub_release(i, v); +} + +static inline long +atomic_long_fetch_sub_relaxed(long i, atomic_long_t *v) +{ + return atomic_fetch_sub_relaxed(i, v); +} + +static inline void +atomic_long_inc(atomic_long_t *v) +{ + atomic_inc(v); +} + +static inline long +atomic_long_inc_return(atomic_long_t *v) +{ + return atomic_inc_return(v); +} + +static inline long +atomic_long_inc_return_acquire(atomic_long_t *v) +{ + return atomic_inc_return_acquire(v); +} + +static inline long +atomic_long_inc_return_release(atomic_long_t *v) +{ + return atomic_inc_return_release(v); +} + +static inline long +atomic_long_inc_return_relaxed(atomic_long_t *v) +{ + return atomic_inc_return_relaxed(v); +} + +static inline long +atomic_long_fetch_inc(atomic_long_t *v) +{ + return atomic_fetch_inc(v); +} + +static inline long +atomic_long_fetch_inc_acquire(atomic_long_t *v) +{ + return atomic_fetch_inc_acquire(v); +} + +static inline long +atomic_long_fetch_inc_release(atomic_long_t *v) +{ + return atomic_fetch_inc_release(v); +} + +static inline long +atomic_long_fetch_inc_relaxed(atomic_long_t *v) +{ + return atomic_fetch_inc_relaxed(v); +} + +static inline void +atomic_long_dec(atomic_long_t *v) +{ + atomic_dec(v); +} + +static inline long +atomic_long_dec_return(atomic_long_t *v) +{ + return atomic_dec_return(v); +} + +static inline long +atomic_long_dec_return_acquire(atomic_long_t *v) +{ + return atomic_dec_return_acquire(v); +} + +static inline long +atomic_long_dec_return_release(atomic_long_t *v) +{ + return atomic_dec_return_release(v); +} + +static inline long +atomic_long_dec_return_relaxed(atomic_long_t *v) +{ + return atomic_dec_return_relaxed(v); +} + +static inline long +atomic_long_fetch_dec(atomic_long_t *v) +{ + return atomic_fetch_dec(v); +} + +static inline long +atomic_long_fetch_dec_acquire(atomic_long_t *v) +{ + return atomic_fetch_dec_acquire(v); +} + +static inline long +atomic_long_fetch_dec_release(atomic_long_t *v) +{ + return atomic_fetch_dec_release(v); +} + +static inline long +atomic_long_fetch_dec_relaxed(atomic_long_t *v) +{ + return atomic_fetch_dec_relaxed(v); +} + +static inline void +atomic_long_and(long i, atomic_long_t *v) +{ + atomic_and(i, v); +} + +static inline long +atomic_long_fetch_and(long i, atomic_long_t *v) +{ + return atomic_fetch_and(i, v); +} + +static inline long +atomic_long_fetch_and_acquire(long i, atomic_long_t *v) +{ + return atomic_fetch_and_acquire(i, v); +} + +static inline long +atomic_long_fetch_and_release(long i, atomic_long_t *v) +{ + return atomic_fetch_and_release(i, v); +} + +static inline long +atomic_long_fetch_and_relaxed(long i, atomic_long_t *v) +{ + return atomic_fetch_and_relaxed(i, v); +} + +static inline void +atomic_long_andnot(long i, atomic_long_t *v) +{ + atomic_andnot(i, v); +} + +static inline long +atomic_long_fetch_andnot(long i, atomic_long_t *v) +{ + return atomic_fetch_andnot(i, v); +} + +static inline long +atomic_long_fetch_andnot_acquire(long i, atomic_long_t *v) +{ + return atomic_fetch_andnot_acquire(i, v); +} + +static inline long +atomic_long_fetch_andnot_release(long i, atomic_long_t *v) +{ + return atomic_fetch_andnot_release(i, v); +} + +static inline long +atomic_long_fetch_andnot_relaxed(long i, atomic_long_t *v) +{ + return atomic_fetch_andnot_relaxed(i, v); +} -#define ATOMIC_LONG_READ_OP(mo) \ -static inline long atomic_long_read##mo(const atomic_long_t *l) \ -{ \ - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; \ - \ - return (long)ATOMIC_LONG_PFX(_read##mo)(v); \ -} -ATOMIC_LONG_READ_OP() -ATOMIC_LONG_READ_OP(_acquire) - -#undef ATOMIC_LONG_READ_OP - -#define ATOMIC_LONG_SET_OP(mo) \ -static inline void atomic_long_set##mo(atomic_long_t *l, long i) \ -{ \ - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; \ - \ - ATOMIC_LONG_PFX(_set##mo)(v, i); \ -} -ATOMIC_LONG_SET_OP() -ATOMIC_LONG_SET_OP(_release) - -#undef ATOMIC_LONG_SET_OP - -#define ATOMIC_LONG_ADD_SUB_OP(op, mo) \ -static inline long \ -atomic_long_##op##_return##mo(long i, atomic_long_t *l) \ -{ \ - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; \ - \ - return (long)ATOMIC_LONG_PFX(_##op##_return##mo)(i, v); \ -} -ATOMIC_LONG_ADD_SUB_OP(add,) -ATOMIC_LONG_ADD_SUB_OP(add, _relaxed) -ATOMIC_LONG_ADD_SUB_OP(add, _acquire) -ATOMIC_LONG_ADD_SUB_OP(add, _release) -ATOMIC_LONG_ADD_SUB_OP(sub,) -ATOMIC_LONG_ADD_SUB_OP(sub, _relaxed) -ATOMIC_LONG_ADD_SUB_OP(sub, _acquire) -ATOMIC_LONG_ADD_SUB_OP(sub, _release) - -#undef ATOMIC_LONG_ADD_SUB_OP - -#define atomic_long_cmpxchg_relaxed(l, old, new) \ - (ATOMIC_LONG_PFX(_cmpxchg_relaxed)((ATOMIC_LONG_PFX(_t) *)(l), \ - (old), (new))) -#define atomic_long_cmpxchg_acquire(l, old, new) \ - (ATOMIC_LONG_PFX(_cmpxchg_acquire)((ATOMIC_LONG_PFX(_t) *)(l), \ - (old), (new))) -#define atomic_long_cmpxchg_release(l, old, new) \ - (ATOMIC_LONG_PFX(_cmpxchg_release)((ATOMIC_LONG_PFX(_t) *)(l), \ - (old), (new))) -#define atomic_long_cmpxchg(l, old, new) \ - (ATOMIC_LONG_PFX(_cmpxchg)((ATOMIC_LONG_PFX(_t) *)(l), (old), (new))) - - -#define atomic_long_try_cmpxchg_relaxed(l, old, new) \ - (ATOMIC_LONG_PFX(_try_cmpxchg_relaxed)((ATOMIC_LONG_PFX(_t) *)(l), \ - (ATOMIC_LONG_TYPE *)(old), (ATOMIC_LONG_TYPE)(new))) -#define atomic_long_try_cmpxchg_acquire(l, old, new) \ - (ATOMIC_LONG_PFX(_try_cmpxchg_acquire)((ATOMIC_LONG_PFX(_t) *)(l), \ - (ATOMIC_LONG_TYPE *)(old), (ATOMIC_LONG_TYPE)(new))) -#define atomic_long_try_cmpxchg_release(l, old, new) \ - (ATOMIC_LONG_PFX(_try_cmpxchg_release)((ATOMIC_LONG_PFX(_t) *)(l), \ - (ATOMIC_LONG_TYPE *)(old), (ATOMIC_LONG_TYPE)(new))) -#define atomic_long_try_cmpxchg(l, old, new) \ - (ATOMIC_LONG_PFX(_try_cmpxchg)((ATOMIC_LONG_PFX(_t) *)(l), \ - (ATOMIC_LONG_TYPE *)(old), (ATOMIC_LONG_TYPE)(new))) - - -#define atomic_long_xchg_relaxed(v, new) \ - (ATOMIC_LONG_PFX(_xchg_relaxed)((ATOMIC_LONG_PFX(_t) *)(v), (new))) -#define atomic_long_xchg_acquire(v, new) \ - (ATOMIC_LONG_PFX(_xchg_acquire)((ATOMIC_LONG_PFX(_t) *)(v), (new))) -#define atomic_long_xchg_release(v, new) \ - (ATOMIC_LONG_PFX(_xchg_release)((ATOMIC_LONG_PFX(_t) *)(v), (new))) -#define atomic_long_xchg(v, new) \ - (ATOMIC_LONG_PFX(_xchg)((ATOMIC_LONG_PFX(_t) *)(v), (new))) - -static __always_inline void atomic_long_inc(atomic_long_t *l) -{ - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; - - ATOMIC_LONG_PFX(_inc)(v); -} - -static __always_inline void atomic_long_dec(atomic_long_t *l) +static inline void +atomic_long_or(long i, atomic_long_t *v) { - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; + atomic_or(i, v); +} - ATOMIC_LONG_PFX(_dec)(v); +static inline long +atomic_long_fetch_or(long i, atomic_long_t *v) +{ + return atomic_fetch_or(i, v); } -#define ATOMIC_LONG_FETCH_OP(op, mo) \ -static inline long \ -atomic_long_fetch_##op##mo(long i, atomic_long_t *l) \ -{ \ - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; \ - \ - return (long)ATOMIC_LONG_PFX(_fetch_##op##mo)(i, v); \ +static inline long +atomic_long_fetch_or_acquire(long i, atomic_long_t *v) +{ + return atomic_fetch_or_acquire(i, v); } -ATOMIC_LONG_FETCH_OP(add, ) -ATOMIC_LONG_FETCH_OP(add, _relaxed) -ATOMIC_LONG_FETCH_OP(add, _acquire) -ATOMIC_LONG_FETCH_OP(add, _release) -ATOMIC_LONG_FETCH_OP(sub, ) -ATOMIC_LONG_FETCH_OP(sub, _relaxed) -ATOMIC_LONG_FETCH_OP(sub, _acquire) -ATOMIC_LONG_FETCH_OP(sub, _release) -ATOMIC_LONG_FETCH_OP(and, ) -ATOMIC_LONG_FETCH_OP(and, _relaxed) -ATOMIC_LONG_FETCH_OP(and, _acquire) -ATOMIC_LONG_FETCH_OP(and, _release) -ATOMIC_LONG_FETCH_OP(andnot, ) -ATOMIC_LONG_FETCH_OP(andnot, _relaxed) -ATOMIC_LONG_FETCH_OP(andnot, _acquire) -ATOMIC_LONG_FETCH_OP(andnot, _release) -ATOMIC_LONG_FETCH_OP(or, ) -ATOMIC_LONG_FETCH_OP(or, _relaxed) -ATOMIC_LONG_FETCH_OP(or, _acquire) -ATOMIC_LONG_FETCH_OP(or, _release) -ATOMIC_LONG_FETCH_OP(xor, ) -ATOMIC_LONG_FETCH_OP(xor, _relaxed) -ATOMIC_LONG_FETCH_OP(xor, _acquire) -ATOMIC_LONG_FETCH_OP(xor, _release) +static inline long +atomic_long_fetch_or_release(long i, atomic_long_t *v) +{ + return atomic_fetch_or_release(i, v); +} -#undef ATOMIC_LONG_FETCH_OP +static inline long +atomic_long_fetch_or_relaxed(long i, atomic_long_t *v) +{ + return atomic_fetch_or_relaxed(i, v); +} -#define ATOMIC_LONG_FETCH_INC_DEC_OP(op, mo) \ -static inline long \ -atomic_long_fetch_##op##mo(atomic_long_t *l) \ -{ \ - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; \ - \ - return (long)ATOMIC_LONG_PFX(_fetch_##op##mo)(v); \ +static inline void +atomic_long_xor(long i, atomic_long_t *v) +{ + atomic_xor(i, v); } -ATOMIC_LONG_FETCH_INC_DEC_OP(inc,) -ATOMIC_LONG_FETCH_INC_DEC_OP(inc, _relaxed) -ATOMIC_LONG_FETCH_INC_DEC_OP(inc, _acquire) -ATOMIC_LONG_FETCH_INC_DEC_OP(inc, _release) -ATOMIC_LONG_FETCH_INC_DEC_OP(dec,) -ATOMIC_LONG_FETCH_INC_DEC_OP(dec, _relaxed) -ATOMIC_LONG_FETCH_INC_DEC_OP(dec, _acquire) -ATOMIC_LONG_FETCH_INC_DEC_OP(dec, _release) +static inline long +atomic_long_fetch_xor(long i, atomic_long_t *v) +{ + return atomic_fetch_xor(i, v); +} -#undef ATOMIC_LONG_FETCH_INC_DEC_OP +static inline long +atomic_long_fetch_xor_acquire(long i, atomic_long_t *v) +{ + return atomic_fetch_xor_acquire(i, v); +} -#define ATOMIC_LONG_OP(op) \ -static __always_inline void \ -atomic_long_##op(long i, atomic_long_t *l) \ -{ \ - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; \ - \ - ATOMIC_LONG_PFX(_##op)(i, v); \ +static inline long +atomic_long_fetch_xor_release(long i, atomic_long_t *v) +{ + return atomic_fetch_xor_release(i, v); } -ATOMIC_LONG_OP(add) -ATOMIC_LONG_OP(sub) -ATOMIC_LONG_OP(and) -ATOMIC_LONG_OP(andnot) -ATOMIC_LONG_OP(or) -ATOMIC_LONG_OP(xor) +static inline long +atomic_long_fetch_xor_relaxed(long i, atomic_long_t *v) +{ + return atomic_fetch_xor_relaxed(i, v); +} -#undef ATOMIC_LONG_OP +static inline long +atomic_long_xchg(atomic_long_t *v, long i) +{ + return atomic_xchg(v, i); +} -static inline int atomic_long_sub_and_test(long i, atomic_long_t *l) +static inline long +atomic_long_xchg_acquire(atomic_long_t *v, long i) { - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; + return atomic_xchg_acquire(v, i); +} - return ATOMIC_LONG_PFX(_sub_and_test)(i, v); +static inline long +atomic_long_xchg_release(atomic_long_t *v, long i) +{ + return atomic_xchg_release(v, i); } -static inline int atomic_long_dec_and_test(atomic_long_t *l) +static inline long +atomic_long_xchg_relaxed(atomic_long_t *v, long i) { - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; + return atomic_xchg_relaxed(v, i); +} - return ATOMIC_LONG_PFX(_dec_and_test)(v); +static inline long +atomic_long_cmpxchg(atomic_long_t *v, long old, long new) +{ + return atomic_cmpxchg(v, old, new); } -static inline int atomic_long_inc_and_test(atomic_long_t *l) +static inline long +atomic_long_cmpxchg_acquire(atomic_long_t *v, long old, long new) { - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; + return atomic_cmpxchg_acquire(v, old, new); +} - return ATOMIC_LONG_PFX(_inc_and_test)(v); +static inline long +atomic_long_cmpxchg_release(atomic_long_t *v, long old, long new) +{ + return atomic_cmpxchg_release(v, old, new); } -static inline int atomic_long_add_negative(long i, atomic_long_t *l) +static inline long +atomic_long_cmpxchg_relaxed(atomic_long_t *v, long old, long new) { - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; + return atomic_cmpxchg_relaxed(v, old, new); +} - return ATOMIC_LONG_PFX(_add_negative)(i, v); +static inline bool +atomic_long_try_cmpxchg(atomic_long_t *v, long *old, long new) +{ + return atomic_try_cmpxchg(v, (int *)old, new); } -#define ATOMIC_LONG_INC_DEC_OP(op, mo) \ -static inline long \ -atomic_long_##op##_return##mo(atomic_long_t *l) \ -{ \ - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; \ - \ - return (long)ATOMIC_LONG_PFX(_##op##_return##mo)(v); \ +static inline bool +atomic_long_try_cmpxchg_acquire(atomic_long_t *v, long *old, long new) +{ + return atomic_try_cmpxchg_acquire(v, (int *)old, new); } -ATOMIC_LONG_INC_DEC_OP(inc,) -ATOMIC_LONG_INC_DEC_OP(inc, _relaxed) -ATOMIC_LONG_INC_DEC_OP(inc, _acquire) -ATOMIC_LONG_INC_DEC_OP(inc, _release) -ATOMIC_LONG_INC_DEC_OP(dec,) -ATOMIC_LONG_INC_DEC_OP(dec, _relaxed) -ATOMIC_LONG_INC_DEC_OP(dec, _acquire) -ATOMIC_LONG_INC_DEC_OP(dec, _release) -#undef ATOMIC_LONG_INC_DEC_OP +static inline bool +atomic_long_try_cmpxchg_release(atomic_long_t *v, long *old, long new) +{ + return atomic_try_cmpxchg_release(v, (int *)old, new); +} + +static inline bool +atomic_long_try_cmpxchg_relaxed(atomic_long_t *v, long *old, long new) +{ + return atomic_try_cmpxchg_relaxed(v, (int *)old, new); +} + +static inline bool +atomic_long_sub_and_test(long i, atomic_long_t *v) +{ + return atomic_sub_and_test(i, v); +} + +static inline bool +atomic_long_dec_and_test(atomic_long_t *v) +{ + return atomic_dec_and_test(v); +} + +static inline bool +atomic_long_inc_and_test(atomic_long_t *v) +{ + return atomic_inc_and_test(v); +} + +static inline bool +atomic_long_add_negative(long i, atomic_long_t *v) +{ + return atomic_add_negative(i, v); +} + +static inline long +atomic_long_fetch_add_unless(atomic_long_t *v, long a, long u) +{ + return atomic_fetch_add_unless(v, a, u); +} + +static inline bool +atomic_long_add_unless(atomic_long_t *v, long a, long u) +{ + return atomic_add_unless(v, a, u); +} -static inline long atomic_long_add_unless(atomic_long_t *l, long a, long u) +static inline bool +atomic_long_inc_not_zero(atomic_long_t *v) { - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; + return atomic_inc_not_zero(v); +} - return (long)ATOMIC_LONG_PFX(_add_unless)(v, a, u); +static inline bool +atomic_long_inc_unless_negative(atomic_long_t *v) +{ + return atomic_inc_unless_negative(v); } -#define atomic_long_inc_not_zero(l) \ - ATOMIC_LONG_PFX(_inc_not_zero)((ATOMIC_LONG_PFX(_t) *)(l)) +static inline bool +atomic_long_dec_unless_positive(atomic_long_t *v) +{ + return atomic_dec_unless_positive(v); +} -#define atomic_long_cond_read_relaxed(v, c) \ - ATOMIC_LONG_PFX(_cond_read_relaxed)((ATOMIC_LONG_PFX(_t) *)(v), (c)) -#define atomic_long_cond_read_acquire(v, c) \ - ATOMIC_LONG_PFX(_cond_read_acquire)((ATOMIC_LONG_PFX(_t) *)(v), (c)) +static inline long +atomic_long_dec_if_positive(atomic_long_t *v) +{ + return atomic_dec_if_positive(v); +} -#endif /* _ASM_GENERIC_ATOMIC_LONG_H */ +#endif /* CONFIG_64BIT */ +#endif /* _ASM_GENERIC_ATOMIC_LONG_H */ +// 77558968132ce4f911ad53f6f52ce423006f6268 diff --git a/include/linux/atomic-fallback.h b/include/linux/atomic-fallback.h new file mode 100644 index 000000000000..a7d240e465c0 --- /dev/null +++ b/include/linux/atomic-fallback.h @@ -0,0 +1,2295 @@ +// SPDX-License-Identifier: GPL-2.0 + +// Generated by scripts/atomic/gen-atomic-fallback.sh +// DO NOT MODIFY THIS FILE DIRECTLY + +#ifndef _LINUX_ATOMIC_FALLBACK_H +#define _LINUX_ATOMIC_FALLBACK_H + +#ifndef xchg_relaxed +#define xchg_relaxed xchg +#define xchg_acquire xchg +#define xchg_release xchg +#else /* xchg_relaxed */ + +#ifndef xchg_acquire +#define xchg_acquire(...) \ + __atomic_op_acquire(xchg, __VA_ARGS__) +#endif + +#ifndef xchg_release +#define xchg_release(...) \ + __atomic_op_release(xchg, __VA_ARGS__) +#endif + +#ifndef xchg +#define xchg(...) \ + __atomic_op_fence(xchg, __VA_ARGS__) +#endif + +#endif /* xchg_relaxed */ + +#ifndef cmpxchg_relaxed +#define cmpxchg_relaxed cmpxchg +#define cmpxchg_acquire cmpxchg +#define cmpxchg_release cmpxchg +#else /* cmpxchg_relaxed */ + +#ifndef cmpxchg_acquire +#define cmpxchg_acquire(...) \ + __atomic_op_acquire(cmpxchg, __VA_ARGS__) +#endif + +#ifndef cmpxchg_release +#define cmpxchg_release(...) \ + __atomic_op_release(cmpxchg, __VA_ARGS__) +#endif + +#ifndef cmpxchg +#define cmpxchg(...) \ + __atomic_op_fence(cmpxchg, __VA_ARGS__) +#endif + +#endif /* cmpxchg_relaxed */ + +#ifndef cmpxchg64_relaxed +#define cmpxchg64_relaxed cmpxchg64 +#define cmpxchg64_acquire cmpxchg64 +#define cmpxchg64_release cmpxchg64 +#else /* cmpxchg64_relaxed */ + +#ifndef cmpxchg64_acquire +#define cmpxchg64_acquire(...) \ + __atomic_op_acquire(cmpxchg64, __VA_ARGS__) +#endif + +#ifndef cmpxchg64_release +#define cmpxchg64_release(...) \ + __atomic_op_release(cmpxchg64, __VA_ARGS__) +#endif + +#ifndef cmpxchg64 +#define cmpxchg64(...) \ + __atomic_op_fence(cmpxchg64, __VA_ARGS__) +#endif + +#endif /* cmpxchg64_relaxed */ + +#ifndef atomic_read_acquire +static inline int +atomic_read_acquire(const atomic_t *v) +{ + return smp_load_acquire(&(v)->counter); +} +#define atomic_read_acquire atomic_read_acquire +#endif + +#ifndef atomic_set_release +static inline void +atomic_set_release(atomic_t *v, int i) +{ + smp_store_release(&(v)->counter, i); +} +#define atomic_set_release atomic_set_release +#endif + +#ifndef atomic_add_return_relaxed +#define atomic_add_return_acquire atomic_add_return +#define atomic_add_return_release atomic_add_return +#define atomic_add_return_relaxed atomic_add_return +#else /* atomic_add_return_relaxed */ + +#ifndef atomic_add_return_acquire +static inline int +atomic_add_return_acquire(int i, atomic_t *v) +{ + int ret = atomic_add_return_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic_add_return_acquire atomic_add_return_acquire +#endif + +#ifndef atomic_add_return_release +static inline int +atomic_add_return_release(int i, atomic_t *v) +{ + __atomic_release_fence(); + return atomic_add_return_relaxed(i, v); +} +#define atomic_add_return_release atomic_add_return_release +#endif + +#ifndef atomic_add_return +static inline int +atomic_add_return(int i, atomic_t *v) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_add_return_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic_add_return atomic_add_return +#endif + +#endif /* atomic_add_return_relaxed */ + +#ifndef atomic_fetch_add_relaxed +#define atomic_fetch_add_acquire atomic_fetch_add +#define atomic_fetch_add_release atomic_fetch_add +#define atomic_fetch_add_relaxed atomic_fetch_add +#else /* atomic_fetch_add_relaxed */ + +#ifndef atomic_fetch_add_acquire +static inline int +atomic_fetch_add_acquire(int i, atomic_t *v) +{ + int ret = atomic_fetch_add_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic_fetch_add_acquire atomic_fetch_add_acquire +#endif + +#ifndef atomic_fetch_add_release +static inline int +atomic_fetch_add_release(int i, atomic_t *v) +{ + __atomic_release_fence(); + return atomic_fetch_add_relaxed(i, v); +} +#define atomic_fetch_add_release atomic_fetch_add_release +#endif + +#ifndef atomic_fetch_add +static inline int +atomic_fetch_add(int i, atomic_t *v) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_fetch_add_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic_fetch_add atomic_fetch_add +#endif + +#endif /* atomic_fetch_add_relaxed */ + +#ifndef atomic_sub_return_relaxed +#define atomic_sub_return_acquire atomic_sub_return +#define atomic_sub_return_release atomic_sub_return +#define atomic_sub_return_relaxed atomic_sub_return +#else /* atomic_sub_return_relaxed */ + +#ifndef atomic_sub_return_acquire +static inline int +atomic_sub_return_acquire(int i, atomic_t *v) +{ + int ret = atomic_sub_return_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic_sub_return_acquire atomic_sub_return_acquire +#endif + +#ifndef atomic_sub_return_release +static inline int +atomic_sub_return_release(int i, atomic_t *v) +{ + __atomic_release_fence(); + return atomic_sub_return_relaxed(i, v); +} +#define atomic_sub_return_release atomic_sub_return_release +#endif + +#ifndef atomic_sub_return +static inline int +atomic_sub_return(int i, atomic_t *v) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_sub_return_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic_sub_return atomic_sub_return +#endif + +#endif /* atomic_sub_return_relaxed */ + +#ifndef atomic_fetch_sub_relaxed +#define atomic_fetch_sub_acquire atomic_fetch_sub +#define atomic_fetch_sub_release atomic_fetch_sub +#define atomic_fetch_sub_relaxed atomic_fetch_sub +#else /* atomic_fetch_sub_relaxed */ + +#ifndef atomic_fetch_sub_acquire +static inline int +atomic_fetch_sub_acquire(int i, atomic_t *v) +{ + int ret = atomic_fetch_sub_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic_fetch_sub_acquire atomic_fetch_sub_acquire +#endif + +#ifndef atomic_fetch_sub_release +static inline int +atomic_fetch_sub_release(int i, atomic_t *v) +{ + __atomic_release_fence(); + return atomic_fetch_sub_relaxed(i, v); +} +#define atomic_fetch_sub_release atomic_fetch_sub_release +#endif + +#ifndef atomic_fetch_sub +static inline int +atomic_fetch_sub(int i, atomic_t *v) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_fetch_sub_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic_fetch_sub atomic_fetch_sub +#endif + +#endif /* atomic_fetch_sub_relaxed */ + +#ifndef atomic_inc +static inline void +atomic_inc(atomic_t *v) +{ + atomic_add(1, v); +} +#define atomic_inc atomic_inc +#endif + +#ifndef atomic_inc_return_relaxed +#ifdef atomic_inc_return +#define atomic_inc_return_acquire atomic_inc_return +#define atomic_inc_return_release atomic_inc_return +#define atomic_inc_return_relaxed atomic_inc_return +#endif /* atomic_inc_return */ + +#ifndef atomic_inc_return +static inline int +atomic_inc_return(atomic_t *v) +{ + return atomic_add_return(1, v); +} +#define atomic_inc_return atomic_inc_return +#endif + +#ifndef atomic_inc_return_acquire +static inline int +atomic_inc_return_acquire(atomic_t *v) +{ + return atomic_add_return_acquire(1, v); +} +#define atomic_inc_return_acquire atomic_inc_return_acquire +#endif + +#ifndef atomic_inc_return_release +static inline int +atomic_inc_return_release(atomic_t *v) +{ + return atomic_add_return_release(1, v); +} +#define atomic_inc_return_release atomic_inc_return_release +#endif + +#ifndef atomic_inc_return_relaxed +static inline int +atomic_inc_return_relaxed(atomic_t *v) +{ + return atomic_add_return_relaxed(1, v); +} +#define atomic_inc_return_relaxed atomic_inc_return_relaxed +#endif + +#else /* atomic_inc_return_relaxed */ + +#ifndef atomic_inc_return_acquire +static inline int +atomic_inc_return_acquire(atomic_t *v) +{ + int ret = atomic_inc_return_relaxed(v); + __atomic_acquire_fence(); + return ret; +} +#define atomic_inc_return_acquire atomic_inc_return_acquire +#endif + +#ifndef atomic_inc_return_release +static inline int +atomic_inc_return_release(atomic_t *v) +{ + __atomic_release_fence(); + return atomic_inc_return_relaxed(v); +} +#define atomic_inc_return_release atomic_inc_return_release +#endif + +#ifndef atomic_inc_return +static inline int +atomic_inc_return(atomic_t *v) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_inc_return_relaxed(v); + __atomic_post_full_fence(); + return ret; +} +#define atomic_inc_return atomic_inc_return +#endif + +#endif /* atomic_inc_return_relaxed */ + +#ifndef atomic_fetch_inc_relaxed +#ifdef atomic_fetch_inc +#define atomic_fetch_inc_acquire atomic_fetch_inc +#define atomic_fetch_inc_release atomic_fetch_inc +#define atomic_fetch_inc_relaxed atomic_fetch_inc +#endif /* atomic_fetch_inc */ + +#ifndef atomic_fetch_inc +static inline int +atomic_fetch_inc(atomic_t *v) +{ + return atomic_fetch_add(1, v); +} +#define atomic_fetch_inc atomic_fetch_inc +#endif + +#ifndef atomic_fetch_inc_acquire +static inline int +atomic_fetch_inc_acquire(atomic_t *v) +{ + return atomic_fetch_add_acquire(1, v); +} +#define atomic_fetch_inc_acquire atomic_fetch_inc_acquire +#endif + +#ifndef atomic_fetch_inc_release +static inline int +atomic_fetch_inc_release(atomic_t *v) +{ + return atomic_fetch_add_release(1, v); +} +#define atomic_fetch_inc_release atomic_fetch_inc_release +#endif + +#ifndef atomic_fetch_inc_relaxed +static inline int +atomic_fetch_inc_relaxed(atomic_t *v) +{ + return atomic_fetch_add_relaxed(1, v); +} +#define atomic_fetch_inc_relaxed atomic_fetch_inc_relaxed +#endif + +#else /* atomic_fetch_inc_relaxed */ + +#ifndef atomic_fetch_inc_acquire +static inline int +atomic_fetch_inc_acquire(atomic_t *v) +{ + int ret = atomic_fetch_inc_relaxed(v); + __atomic_acquire_fence(); + return ret; +} +#define atomic_fetch_inc_acquire atomic_fetch_inc_acquire +#endif + +#ifndef atomic_fetch_inc_release +static inline int +atomic_fetch_inc_release(atomic_t *v) +{ + __atomic_release_fence(); + return atomic_fetch_inc_relaxed(v); +} +#define atomic_fetch_inc_release atomic_fetch_inc_release +#endif + +#ifndef atomic_fetch_inc +static inline int +atomic_fetch_inc(atomic_t *v) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_fetch_inc_relaxed(v); + __atomic_post_full_fence(); + return ret; +} +#define atomic_fetch_inc atomic_fetch_inc +#endif + +#endif /* atomic_fetch_inc_relaxed */ + +#ifndef atomic_dec +static inline void +atomic_dec(atomic_t *v) +{ + atomic_sub(1, v); +} +#define atomic_dec atomic_dec +#endif + +#ifndef atomic_dec_return_relaxed +#ifdef atomic_dec_return +#define atomic_dec_return_acquire atomic_dec_return +#define atomic_dec_return_release atomic_dec_return +#define atomic_dec_return_relaxed atomic_dec_return +#endif /* atomic_dec_return */ + +#ifndef atomic_dec_return +static inline int +atomic_dec_return(atomic_t *v) +{ + return atomic_sub_return(1, v); +} +#define atomic_dec_return atomic_dec_return +#endif + +#ifndef atomic_dec_return_acquire +static inline int +atomic_dec_return_acquire(atomic_t *v) +{ + return atomic_sub_return_acquire(1, v); +} +#define atomic_dec_return_acquire atomic_dec_return_acquire +#endif + +#ifndef atomic_dec_return_release +static inline int +atomic_dec_return_release(atomic_t *v) +{ + return atomic_sub_return_release(1, v); +} +#define atomic_dec_return_release atomic_dec_return_release +#endif + +#ifndef atomic_dec_return_relaxed +static inline int +atomic_dec_return_relaxed(atomic_t *v) +{ + return atomic_sub_return_relaxed(1, v); +} +#define atomic_dec_return_relaxed atomic_dec_return_relaxed +#endif + +#else /* atomic_dec_return_relaxed */ + +#ifndef atomic_dec_return_acquire +static inline int +atomic_dec_return_acquire(atomic_t *v) +{ + int ret = atomic_dec_return_relaxed(v); + __atomic_acquire_fence(); + return ret; +} +#define atomic_dec_return_acquire atomic_dec_return_acquire +#endif + +#ifndef atomic_dec_return_release +static inline int +atomic_dec_return_release(atomic_t *v) +{ + __atomic_release_fence(); + return atomic_dec_return_relaxed(v); +} +#define atomic_dec_return_release atomic_dec_return_release +#endif + +#ifndef atomic_dec_return +static inline int +atomic_dec_return(atomic_t *v) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_dec_return_relaxed(v); + __atomic_post_full_fence(); + return ret; +} +#define atomic_dec_return atomic_dec_return +#endif + +#endif /* atomic_dec_return_relaxed */ + +#ifndef atomic_fetch_dec_relaxed +#ifdef atomic_fetch_dec +#define atomic_fetch_dec_acquire atomic_fetch_dec +#define atomic_fetch_dec_release atomic_fetch_dec +#define atomic_fetch_dec_relaxed atomic_fetch_dec +#endif /* atomic_fetch_dec */ + +#ifndef atomic_fetch_dec +static inline int +atomic_fetch_dec(atomic_t *v) +{ + return atomic_fetch_sub(1, v); +} +#define atomic_fetch_dec atomic_fetch_dec +#endif + +#ifndef atomic_fetch_dec_acquire +static inline int +atomic_fetch_dec_acquire(atomic_t *v) +{ + return atomic_fetch_sub_acquire(1, v); +} +#define atomic_fetch_dec_acquire atomic_fetch_dec_acquire +#endif + +#ifndef atomic_fetch_dec_release +static inline int +atomic_fetch_dec_release(atomic_t *v) +{ + return atomic_fetch_sub_release(1, v); +} +#define atomic_fetch_dec_release atomic_fetch_dec_release +#endif + +#ifndef atomic_fetch_dec_relaxed +static inline int +atomic_fetch_dec_relaxed(atomic_t *v) +{ + return atomic_fetch_sub_relaxed(1, v); +} +#define atomic_fetch_dec_relaxed atomic_fetch_dec_relaxed +#endif + +#else /* atomic_fetch_dec_relaxed */ + +#ifndef atomic_fetch_dec_acquire +static inline int +atomic_fetch_dec_acquire(atomic_t *v) +{ + int ret = atomic_fetch_dec_relaxed(v); + __atomic_acquire_fence(); + return ret; +} +#define atomic_fetch_dec_acquire atomic_fetch_dec_acquire +#endif + +#ifndef atomic_fetch_dec_release +static inline int +atomic_fetch_dec_release(atomic_t *v) +{ + __atomic_release_fence(); + return atomic_fetch_dec_relaxed(v); +} +#define atomic_fetch_dec_release atomic_fetch_dec_release +#endif + +#ifndef atomic_fetch_dec +static inline int +atomic_fetch_dec(atomic_t *v) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_fetch_dec_relaxed(v); + __atomic_post_full_fence(); + return ret; +} +#define atomic_fetch_dec atomic_fetch_dec +#endif + +#endif /* atomic_fetch_dec_relaxed */ + +#ifndef atomic_fetch_and_relaxed +#define atomic_fetch_and_acquire atomic_fetch_and +#define atomic_fetch_and_release atomic_fetch_and +#define atomic_fetch_and_relaxed atomic_fetch_and +#else /* atomic_fetch_and_relaxed */ + +#ifndef atomic_fetch_and_acquire +static inline int +atomic_fetch_and_acquire(int i, atomic_t *v) +{ + int ret = atomic_fetch_and_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic_fetch_and_acquire atomic_fetch_and_acquire +#endif + +#ifndef atomic_fetch_and_release +static inline int +atomic_fetch_and_release(int i, atomic_t *v) +{ + __atomic_release_fence(); + return atomic_fetch_and_relaxed(i, v); +} +#define atomic_fetch_and_release atomic_fetch_and_release +#endif + +#ifndef atomic_fetch_and +static inline int +atomic_fetch_and(int i, atomic_t *v) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_fetch_and_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic_fetch_and atomic_fetch_and +#endif + +#endif /* atomic_fetch_and_relaxed */ + +#ifndef atomic_andnot +static inline void +atomic_andnot(int i, atomic_t *v) +{ + atomic_and(~i, v); +} +#define atomic_andnot atomic_andnot +#endif + +#ifndef atomic_fetch_andnot_relaxed +#ifdef atomic_fetch_andnot +#define atomic_fetch_andnot_acquire atomic_fetch_andnot +#define atomic_fetch_andnot_release atomic_fetch_andnot +#define atomic_fetch_andnot_relaxed atomic_fetch_andnot +#endif /* atomic_fetch_andnot */ + +#ifndef atomic_fetch_andnot +static inline int +atomic_fetch_andnot(int i, atomic_t *v) +{ + return atomic_fetch_and(~i, v); +} +#define atomic_fetch_andnot atomic_fetch_andnot +#endif + +#ifndef atomic_fetch_andnot_acquire +static inline int +atomic_fetch_andnot_acquire(int i, atomic_t *v) +{ + return atomic_fetch_and_acquire(~i, v); +} +#define atomic_fetch_andnot_acquire atomic_fetch_andnot_acquire +#endif + +#ifndef atomic_fetch_andnot_release +static inline int +atomic_fetch_andnot_release(int i, atomic_t *v) +{ + return atomic_fetch_and_release(~i, v); +} +#define atomic_fetch_andnot_release atomic_fetch_andnot_release +#endif + +#ifndef atomic_fetch_andnot_relaxed +static inline int +atomic_fetch_andnot_relaxed(int i, atomic_t *v) +{ + return atomic_fetch_and_relaxed(~i, v); +} +#define atomic_fetch_andnot_relaxed atomic_fetch_andnot_relaxed +#endif + +#else /* atomic_fetch_andnot_relaxed */ + +#ifndef atomic_fetch_andnot_acquire +static inline int +atomic_fetch_andnot_acquire(int i, atomic_t *v) +{ + int ret = atomic_fetch_andnot_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic_fetch_andnot_acquire atomic_fetch_andnot_acquire +#endif + +#ifndef atomic_fetch_andnot_release +static inline int +atomic_fetch_andnot_release(int i, atomic_t *v) +{ + __atomic_release_fence(); + return atomic_fetch_andnot_relaxed(i, v); +} +#define atomic_fetch_andnot_release atomic_fetch_andnot_release +#endif + +#ifndef atomic_fetch_andnot +static inline int +atomic_fetch_andnot(int i, atomic_t *v) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_fetch_andnot_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic_fetch_andnot atomic_fetch_andnot +#endif + +#endif /* atomic_fetch_andnot_relaxed */ + +#ifndef atomic_fetch_or_relaxed +#define atomic_fetch_or_acquire atomic_fetch_or +#define atomic_fetch_or_release atomic_fetch_or +#define atomic_fetch_or_relaxed atomic_fetch_or +#else /* atomic_fetch_or_relaxed */ + +#ifndef atomic_fetch_or_acquire +static inline int +atomic_fetch_or_acquire(int i, atomic_t *v) +{ + int ret = atomic_fetch_or_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic_fetch_or_acquire atomic_fetch_or_acquire +#endif + +#ifndef atomic_fetch_or_release +static inline int +atomic_fetch_or_release(int i, atomic_t *v) +{ + __atomic_release_fence(); + return atomic_fetch_or_relaxed(i, v); +} +#define atomic_fetch_or_release atomic_fetch_or_release +#endif + +#ifndef atomic_fetch_or +static inline int +atomic_fetch_or(int i, atomic_t *v) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_fetch_or_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic_fetch_or atomic_fetch_or +#endif + +#endif /* atomic_fetch_or_relaxed */ + +#ifndef atomic_fetch_xor_relaxed +#define atomic_fetch_xor_acquire atomic_fetch_xor +#define atomic_fetch_xor_release atomic_fetch_xor +#define atomic_fetch_xor_relaxed atomic_fetch_xor +#else /* atomic_fetch_xor_relaxed */ + +#ifndef atomic_fetch_xor_acquire +static inline int +atomic_fetch_xor_acquire(int i, atomic_t *v) +{ + int ret = atomic_fetch_xor_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic_fetch_xor_acquire atomic_fetch_xor_acquire +#endif + +#ifndef atomic_fetch_xor_release +static inline int +atomic_fetch_xor_release(int i, atomic_t *v) +{ + __atomic_release_fence(); + return atomic_fetch_xor_relaxed(i, v); +} +#define atomic_fetch_xor_release atomic_fetch_xor_release +#endif + +#ifndef atomic_fetch_xor +static inline int +atomic_fetch_xor(int i, atomic_t *v) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_fetch_xor_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic_fetch_xor atomic_fetch_xor +#endif + +#endif /* atomic_fetch_xor_relaxed */ + +#ifndef atomic_xchg_relaxed +#define atomic_xchg_acquire atomic_xchg +#define atomic_xchg_release atomic_xchg +#define atomic_xchg_relaxed atomic_xchg +#else /* atomic_xchg_relaxed */ + +#ifndef atomic_xchg_acquire +static inline int +atomic_xchg_acquire(atomic_t *v, int i) +{ + int ret = atomic_xchg_relaxed(v, i); + __atomic_acquire_fence(); + return ret; +} +#define atomic_xchg_acquire atomic_xchg_acquire +#endif + +#ifndef atomic_xchg_release +static inline int +atomic_xchg_release(atomic_t *v, int i) +{ + __atomic_release_fence(); + return atomic_xchg_relaxed(v, i); +} +#define atomic_xchg_release atomic_xchg_release +#endif + +#ifndef atomic_xchg +static inline int +atomic_xchg(atomic_t *v, int i) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_xchg_relaxed(v, i); + __atomic_post_full_fence(); + return ret; +} +#define atomic_xchg atomic_xchg +#endif + +#endif /* atomic_xchg_relaxed */ + +#ifndef atomic_cmpxchg_relaxed +#define atomic_cmpxchg_acquire atomic_cmpxchg +#define atomic_cmpxchg_release atomic_cmpxchg +#define atomic_cmpxchg_relaxed atomic_cmpxchg +#else /* atomic_cmpxchg_relaxed */ + +#ifndef atomic_cmpxchg_acquire +static inline int +atomic_cmpxchg_acquire(atomic_t *v, int old, int new) +{ + int ret = atomic_cmpxchg_relaxed(v, old, new); + __atomic_acquire_fence(); + return ret; +} +#define atomic_cmpxchg_acquire atomic_cmpxchg_acquire +#endif + +#ifndef atomic_cmpxchg_release +static inline int +atomic_cmpxchg_release(atomic_t *v, int old, int new) +{ + __atomic_release_fence(); + return atomic_cmpxchg_relaxed(v, old, new); +} +#define atomic_cmpxchg_release atomic_cmpxchg_release +#endif + +#ifndef atomic_cmpxchg +static inline int +atomic_cmpxchg(atomic_t *v, int old, int new) +{ + int ret; + __atomic_pre_full_fence(); + ret = atomic_cmpxchg_relaxed(v, old, new); + __atomic_post_full_fence(); + return ret; +} +#define atomic_cmpxchg atomic_cmpxchg +#endif + +#endif /* atomic_cmpxchg_relaxed */ + +#ifndef atomic_try_cmpxchg_relaxed +#ifdef atomic_try_cmpxchg +#define atomic_try_cmpxchg_acquire atomic_try_cmpxchg +#define atomic_try_cmpxchg_release atomic_try_cmpxchg +#define atomic_try_cmpxchg_relaxed atomic_try_cmpxchg +#endif /* atomic_try_cmpxchg */ + +#ifndef atomic_try_cmpxchg +static inline bool +atomic_try_cmpxchg(atomic_t *v, int *old, int new) +{ + int r, o = *old; + r = atomic_cmpxchg(v, o, new); + if (unlikely(r != o)) + *old = r; + return likely(r == o); +} +#define atomic_try_cmpxchg atomic_try_cmpxchg +#endif + +#ifndef atomic_try_cmpxchg_acquire +static inline bool +atomic_try_cmpxchg_acquire(atomic_t *v, int *old, int new) +{ + int r, o = *old; + r = atomic_cmpxchg_acquire(v, o, new); + if (unlikely(r != o)) + *old = r; + return likely(r == o); +} +#define atomic_try_cmpxchg_acquire atomic_try_cmpxchg_acquire +#endif + +#ifndef atomic_try_cmpxchg_release +static inline bool +atomic_try_cmpxchg_release(atomic_t *v, int *old, int new) +{ + int r, o = *old; + r = atomic_cmpxchg_release(v, o, new); + if (unlikely(r != o)) + *old = r; + return likely(r == o); +} +#define atomic_try_cmpxchg_release atomic_try_cmpxchg_release +#endif + +#ifndef atomic_try_cmpxchg_relaxed +static inline bool +atomic_try_cmpxchg_relaxed(atomic_t *v, int *old, int new) +{ + int r, o = *old; + r = atomic_cmpxchg_relaxed(v, o, new); + if (unlikely(r != o)) + *old = r; + return likely(r == o); +} +#define atomic_try_cmpxchg_relaxed atomic_try_cmpxchg_relaxed +#endif + +#else /* atomic_try_cmpxchg_relaxed */ + +#ifndef atomic_try_cmpxchg_acquire +static inline bool +atomic_try_cmpxchg_acquire(atomic_t *v, int *old, int new) +{ + bool ret = atomic_try_cmpxchg_relaxed(v, old, new); + __atomic_acquire_fence(); + return ret; +} +#define atomic_try_cmpxchg_acquire atomic_try_cmpxchg_acquire +#endif + +#ifndef atomic_try_cmpxchg_release +static inline bool +atomic_try_cmpxchg_release(atomic_t *v, int *old, int new) +{ + __atomic_release_fence(); + return atomic_try_cmpxchg_relaxed(v, old, new); +} +#define atomic_try_cmpxchg_release atomic_try_cmpxchg_release +#endif + +#ifndef atomic_try_cmpxchg +static inline bool +atomic_try_cmpxchg(atomic_t *v, int *old, int new) +{ + bool ret; + __atomic_pre_full_fence(); + ret = atomic_try_cmpxchg_relaxed(v, old, new); + __atomic_post_full_fence(); + return ret; +} +#define atomic_try_cmpxchg atomic_try_cmpxchg +#endif + +#endif /* atomic_try_cmpxchg_relaxed */ + +#ifndef atomic_sub_and_test +/** + * atomic_sub_and_test - subtract value from variable and test result + * @i: integer value to subtract + * @v: pointer of type atomic_t + * + * Atomically subtracts @i from @v and returns + * true if the result is zero, or false for all + * other cases. + */ +static inline bool +atomic_sub_and_test(int i, atomic_t *v) +{ + return atomic_sub_return(i, v) == 0; +} +#define atomic_sub_and_test atomic_sub_and_test +#endif + +#ifndef atomic_dec_and_test +/** + * atomic_dec_and_test - decrement and test + * @v: pointer of type atomic_t + * + * Atomically decrements @v by 1 and + * returns true if the result is 0, or false for all other + * cases. + */ +static inline bool +atomic_dec_and_test(atomic_t *v) +{ + return atomic_dec_return(v) == 0; +} +#define atomic_dec_and_test atomic_dec_and_test +#endif + +#ifndef atomic_inc_and_test +/** + * atomic_inc_and_test - increment and test + * @v: pointer of type atomic_t + * + * Atomically increments @v by 1 + * and returns true if the result is zero, or false for all + * other cases. + */ +static inline bool +atomic_inc_and_test(atomic_t *v) +{ + return atomic_inc_return(v) == 0; +} +#define atomic_inc_and_test atomic_inc_and_test +#endif + +#ifndef atomic_add_negative +/** + * atomic_add_negative - add and test if negative + * @i: integer value to add + * @v: pointer of type atomic_t + * + * Atomically adds @i to @v and returns true + * if the result is negative, or false when + * result is greater than or equal to zero. + */ +static inline bool +atomic_add_negative(int i, atomic_t *v) +{ + return atomic_add_return(i, v) < 0; +} +#define atomic_add_negative atomic_add_negative +#endif + +#ifndef atomic_fetch_add_unless +/** + * atomic_fetch_add_unless - add unless the number is already a given value + * @v: pointer of type atomic_t + * @a: the amount to add to v... + * @u: ...unless v is equal to u. + * + * Atomically adds @a to @v, so long as @v was not already @u. + * Returns original value of @v + */ +static inline int +atomic_fetch_add_unless(atomic_t *v, int a, int u) +{ + int c = atomic_read(v); + + do { + if (unlikely(c == u)) + break; + } while (!atomic_try_cmpxchg(v, &c, c + a)); + + return c; +} +#define atomic_fetch_add_unless atomic_fetch_add_unless +#endif + +#ifndef atomic_add_unless +/** + * atomic_add_unless - add unless the number is already a given value + * @v: pointer of type atomic_t + * @a: the amount to add to v... + * @u: ...unless v is equal to u. + * + * Atomically adds @a to @v, if @v was not already @u. + * Returns true if the addition was done. + */ +static inline bool +atomic_add_unless(atomic_t *v, int a, int u) +{ + return atomic_fetch_add_unless(v, a, u) != u; +} +#define atomic_add_unless atomic_add_unless +#endif + +#ifndef atomic_inc_not_zero +/** + * atomic_inc_not_zero - increment unless the number is zero + * @v: pointer of type atomic_t + * + * Atomically increments @v by 1, if @v is non-zero. + * Returns true if the increment was done. + */ +static inline bool +atomic_inc_not_zero(atomic_t *v) +{ + return atomic_add_unless(v, 1, 0); +} +#define atomic_inc_not_zero atomic_inc_not_zero +#endif + +#ifndef atomic_inc_unless_negative +static inline bool +atomic_inc_unless_negative(atomic_t *v) +{ + int c = atomic_read(v); + + do { + if (unlikely(c < 0)) + return false; + } while (!atomic_try_cmpxchg(v, &c, c + 1)); + + return true; +} +#define atomic_inc_unless_negative atomic_inc_unless_negative +#endif + +#ifndef atomic_dec_unless_positive +static inline bool +atomic_dec_unless_positive(atomic_t *v) +{ + int c = atomic_read(v); + + do { + if (unlikely(c > 0)) + return false; + } while (!atomic_try_cmpxchg(v, &c, c - 1)); + + return true; +} +#define atomic_dec_unless_positive atomic_dec_unless_positive +#endif + +#ifndef atomic_dec_if_positive +static inline int +atomic_dec_if_positive(atomic_t *v) +{ + int dec, c = atomic_read(v); + + do { + dec = c - 1; + if (unlikely(dec < 0)) + break; + } while (!atomic_try_cmpxchg(v, &c, dec)); + + return dec; +} +#define atomic_dec_if_positive atomic_dec_if_positive +#endif + +#define atomic_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c)) +#define atomic_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c)) + +#ifdef CONFIG_GENERIC_ATOMIC64 +#include <asm-generic/atomic64.h> +#endif + +#ifndef atomic64_read_acquire +static inline s64 +atomic64_read_acquire(const atomic64_t *v) +{ + return smp_load_acquire(&(v)->counter); +} +#define atomic64_read_acquire atomic64_read_acquire +#endif + +#ifndef atomic64_set_release +static inline void +atomic64_set_release(atomic64_t *v, s64 i) +{ + smp_store_release(&(v)->counter, i); +} +#define atomic64_set_release atomic64_set_release +#endif + +#ifndef atomic64_add_return_relaxed +#define atomic64_add_return_acquire atomic64_add_return +#define atomic64_add_return_release atomic64_add_return +#define atomic64_add_return_relaxed atomic64_add_return +#else /* atomic64_add_return_relaxed */ + +#ifndef atomic64_add_return_acquire +static inline s64 +atomic64_add_return_acquire(s64 i, atomic64_t *v) +{ + s64 ret = atomic64_add_return_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_add_return_acquire atomic64_add_return_acquire +#endif + +#ifndef atomic64_add_return_release +static inline s64 +atomic64_add_return_release(s64 i, atomic64_t *v) +{ + __atomic_release_fence(); + return atomic64_add_return_relaxed(i, v); +} +#define atomic64_add_return_release atomic64_add_return_release +#endif + +#ifndef atomic64_add_return +static inline s64 +atomic64_add_return(s64 i, atomic64_t *v) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_add_return_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_add_return atomic64_add_return +#endif + +#endif /* atomic64_add_return_relaxed */ + +#ifndef atomic64_fetch_add_relaxed +#define atomic64_fetch_add_acquire atomic64_fetch_add +#define atomic64_fetch_add_release atomic64_fetch_add +#define atomic64_fetch_add_relaxed atomic64_fetch_add +#else /* atomic64_fetch_add_relaxed */ + +#ifndef atomic64_fetch_add_acquire +static inline s64 +atomic64_fetch_add_acquire(s64 i, atomic64_t *v) +{ + s64 ret = atomic64_fetch_add_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_fetch_add_acquire atomic64_fetch_add_acquire +#endif + +#ifndef atomic64_fetch_add_release +static inline s64 +atomic64_fetch_add_release(s64 i, atomic64_t *v) +{ + __atomic_release_fence(); + return atomic64_fetch_add_relaxed(i, v); +} +#define atomic64_fetch_add_release atomic64_fetch_add_release +#endif + +#ifndef atomic64_fetch_add +static inline s64 +atomic64_fetch_add(s64 i, atomic64_t *v) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_fetch_add_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_fetch_add atomic64_fetch_add +#endif + +#endif /* atomic64_fetch_add_relaxed */ + +#ifndef atomic64_sub_return_relaxed +#define atomic64_sub_return_acquire atomic64_sub_return +#define atomic64_sub_return_release atomic64_sub_return +#define atomic64_sub_return_relaxed atomic64_sub_return +#else /* atomic64_sub_return_relaxed */ + +#ifndef atomic64_sub_return_acquire +static inline s64 +atomic64_sub_return_acquire(s64 i, atomic64_t *v) +{ + s64 ret = atomic64_sub_return_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_sub_return_acquire atomic64_sub_return_acquire +#endif + +#ifndef atomic64_sub_return_release +static inline s64 +atomic64_sub_return_release(s64 i, atomic64_t *v) +{ + __atomic_release_fence(); + return atomic64_sub_return_relaxed(i, v); +} +#define atomic64_sub_return_release atomic64_sub_return_release +#endif + +#ifndef atomic64_sub_return +static inline s64 +atomic64_sub_return(s64 i, atomic64_t *v) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_sub_return_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_sub_return atomic64_sub_return +#endif + +#endif /* atomic64_sub_return_relaxed */ + +#ifndef atomic64_fetch_sub_relaxed +#define atomic64_fetch_sub_acquire atomic64_fetch_sub +#define atomic64_fetch_sub_release atomic64_fetch_sub +#define atomic64_fetch_sub_relaxed atomic64_fetch_sub +#else /* atomic64_fetch_sub_relaxed */ + +#ifndef atomic64_fetch_sub_acquire +static inline s64 +atomic64_fetch_sub_acquire(s64 i, atomic64_t *v) +{ + s64 ret = atomic64_fetch_sub_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_fetch_sub_acquire atomic64_fetch_sub_acquire +#endif + +#ifndef atomic64_fetch_sub_release +static inline s64 +atomic64_fetch_sub_release(s64 i, atomic64_t *v) +{ + __atomic_release_fence(); + return atomic64_fetch_sub_relaxed(i, v); +} +#define atomic64_fetch_sub_release atomic64_fetch_sub_release +#endif + +#ifndef atomic64_fetch_sub +static inline s64 +atomic64_fetch_sub(s64 i, atomic64_t *v) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_fetch_sub_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_fetch_sub atomic64_fetch_sub +#endif + +#endif /* atomic64_fetch_sub_relaxed */ + +#ifndef atomic64_inc +static inline void +atomic64_inc(atomic64_t *v) +{ + atomic64_add(1, v); +} +#define atomic64_inc atomic64_inc +#endif + +#ifndef atomic64_inc_return_relaxed +#ifdef atomic64_inc_return +#define atomic64_inc_return_acquire atomic64_inc_return +#define atomic64_inc_return_release atomic64_inc_return +#define atomic64_inc_return_relaxed atomic64_inc_return +#endif /* atomic64_inc_return */ + +#ifndef atomic64_inc_return +static inline s64 +atomic64_inc_return(atomic64_t *v) +{ + return atomic64_add_return(1, v); +} +#define atomic64_inc_return atomic64_inc_return +#endif + +#ifndef atomic64_inc_return_acquire +static inline s64 +atomic64_inc_return_acquire(atomic64_t *v) +{ + return atomic64_add_return_acquire(1, v); +} +#define atomic64_inc_return_acquire atomic64_inc_return_acquire +#endif + +#ifndef atomic64_inc_return_release +static inline s64 +atomic64_inc_return_release(atomic64_t *v) +{ + return atomic64_add_return_release(1, v); +} +#define atomic64_inc_return_release atomic64_inc_return_release +#endif + +#ifndef atomic64_inc_return_relaxed +static inline s64 +atomic64_inc_return_relaxed(atomic64_t *v) +{ + return atomic64_add_return_relaxed(1, v); +} +#define atomic64_inc_return_relaxed atomic64_inc_return_relaxed +#endif + +#else /* atomic64_inc_return_relaxed */ + +#ifndef atomic64_inc_return_acquire +static inline s64 +atomic64_inc_return_acquire(atomic64_t *v) +{ + s64 ret = atomic64_inc_return_relaxed(v); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_inc_return_acquire atomic64_inc_return_acquire +#endif + +#ifndef atomic64_inc_return_release +static inline s64 +atomic64_inc_return_release(atomic64_t *v) +{ + __atomic_release_fence(); + return atomic64_inc_return_relaxed(v); +} +#define atomic64_inc_return_release atomic64_inc_return_release +#endif + +#ifndef atomic64_inc_return +static inline s64 +atomic64_inc_return(atomic64_t *v) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_inc_return_relaxed(v); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_inc_return atomic64_inc_return +#endif + +#endif /* atomic64_inc_return_relaxed */ + +#ifndef atomic64_fetch_inc_relaxed +#ifdef atomic64_fetch_inc +#define atomic64_fetch_inc_acquire atomic64_fetch_inc +#define atomic64_fetch_inc_release atomic64_fetch_inc +#define atomic64_fetch_inc_relaxed atomic64_fetch_inc +#endif /* atomic64_fetch_inc */ + +#ifndef atomic64_fetch_inc +static inline s64 +atomic64_fetch_inc(atomic64_t *v) +{ + return atomic64_fetch_add(1, v); +} +#define atomic64_fetch_inc atomic64_fetch_inc +#endif + +#ifndef atomic64_fetch_inc_acquire +static inline s64 +atomic64_fetch_inc_acquire(atomic64_t *v) +{ + return atomic64_fetch_add_acquire(1, v); +} +#define atomic64_fetch_inc_acquire atomic64_fetch_inc_acquire +#endif + +#ifndef atomic64_fetch_inc_release +static inline s64 +atomic64_fetch_inc_release(atomic64_t *v) +{ + return atomic64_fetch_add_release(1, v); +} +#define atomic64_fetch_inc_release atomic64_fetch_inc_release +#endif + +#ifndef atomic64_fetch_inc_relaxed +static inline s64 +atomic64_fetch_inc_relaxed(atomic64_t *v) +{ + return atomic64_fetch_add_relaxed(1, v); +} +#define atomic64_fetch_inc_relaxed atomic64_fetch_inc_relaxed +#endif + +#else /* atomic64_fetch_inc_relaxed */ + +#ifndef atomic64_fetch_inc_acquire +static inline s64 +atomic64_fetch_inc_acquire(atomic64_t *v) +{ + s64 ret = atomic64_fetch_inc_relaxed(v); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_fetch_inc_acquire atomic64_fetch_inc_acquire +#endif + +#ifndef atomic64_fetch_inc_release +static inline s64 +atomic64_fetch_inc_release(atomic64_t *v) +{ + __atomic_release_fence(); + return atomic64_fetch_inc_relaxed(v); +} +#define atomic64_fetch_inc_release atomic64_fetch_inc_release +#endif + +#ifndef atomic64_fetch_inc +static inline s64 +atomic64_fetch_inc(atomic64_t *v) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_fetch_inc_relaxed(v); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_fetch_inc atomic64_fetch_inc +#endif + +#endif /* atomic64_fetch_inc_relaxed */ + +#ifndef atomic64_dec +static inline void +atomic64_dec(atomic64_t *v) +{ + atomic64_sub(1, v); +} +#define atomic64_dec atomic64_dec +#endif + +#ifndef atomic64_dec_return_relaxed +#ifdef atomic64_dec_return +#define atomic64_dec_return_acquire atomic64_dec_return +#define atomic64_dec_return_release atomic64_dec_return +#define atomic64_dec_return_relaxed atomic64_dec_return +#endif /* atomic64_dec_return */ + +#ifndef atomic64_dec_return +static inline s64 +atomic64_dec_return(atomic64_t *v) +{ + return atomic64_sub_return(1, v); +} +#define atomic64_dec_return atomic64_dec_return +#endif + +#ifndef atomic64_dec_return_acquire +static inline s64 +atomic64_dec_return_acquire(atomic64_t *v) +{ + return atomic64_sub_return_acquire(1, v); +} +#define atomic64_dec_return_acquire atomic64_dec_return_acquire +#endif + +#ifndef atomic64_dec_return_release +static inline s64 +atomic64_dec_return_release(atomic64_t *v) +{ + return atomic64_sub_return_release(1, v); +} +#define atomic64_dec_return_release atomic64_dec_return_release +#endif + +#ifndef atomic64_dec_return_relaxed +static inline s64 +atomic64_dec_return_relaxed(atomic64_t *v) +{ + return atomic64_sub_return_relaxed(1, v); +} +#define atomic64_dec_return_relaxed atomic64_dec_return_relaxed +#endif + +#else /* atomic64_dec_return_relaxed */ + +#ifndef atomic64_dec_return_acquire +static inline s64 +atomic64_dec_return_acquire(atomic64_t *v) +{ + s64 ret = atomic64_dec_return_relaxed(v); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_dec_return_acquire atomic64_dec_return_acquire +#endif + +#ifndef atomic64_dec_return_release +static inline s64 +atomic64_dec_return_release(atomic64_t *v) +{ + __atomic_release_fence(); + return atomic64_dec_return_relaxed(v); +} +#define atomic64_dec_return_release atomic64_dec_return_release +#endif + +#ifndef atomic64_dec_return +static inline s64 +atomic64_dec_return(atomic64_t *v) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_dec_return_relaxed(v); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_dec_return atomic64_dec_return +#endif + +#endif /* atomic64_dec_return_relaxed */ + +#ifndef atomic64_fetch_dec_relaxed +#ifdef atomic64_fetch_dec +#define atomic64_fetch_dec_acquire atomic64_fetch_dec +#define atomic64_fetch_dec_release atomic64_fetch_dec +#define atomic64_fetch_dec_relaxed atomic64_fetch_dec +#endif /* atomic64_fetch_dec */ + +#ifndef atomic64_fetch_dec +static inline s64 +atomic64_fetch_dec(atomic64_t *v) +{ + return atomic64_fetch_sub(1, v); +} +#define atomic64_fetch_dec atomic64_fetch_dec +#endif + +#ifndef atomic64_fetch_dec_acquire +static inline s64 +atomic64_fetch_dec_acquire(atomic64_t *v) +{ + return atomic64_fetch_sub_acquire(1, v); +} +#define atomic64_fetch_dec_acquire atomic64_fetch_dec_acquire +#endif + +#ifndef atomic64_fetch_dec_release +static inline s64 +atomic64_fetch_dec_release(atomic64_t *v) +{ + return atomic64_fetch_sub_release(1, v); +} +#define atomic64_fetch_dec_release atomic64_fetch_dec_release +#endif + +#ifndef atomic64_fetch_dec_relaxed +static inline s64 +atomic64_fetch_dec_relaxed(atomic64_t *v) +{ + return atomic64_fetch_sub_relaxed(1, v); +} +#define atomic64_fetch_dec_relaxed atomic64_fetch_dec_relaxed +#endif + +#else /* atomic64_fetch_dec_relaxed */ + +#ifndef atomic64_fetch_dec_acquire +static inline s64 +atomic64_fetch_dec_acquire(atomic64_t *v) +{ + s64 ret = atomic64_fetch_dec_relaxed(v); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_fetch_dec_acquire atomic64_fetch_dec_acquire +#endif + +#ifndef atomic64_fetch_dec_release +static inline s64 +atomic64_fetch_dec_release(atomic64_t *v) +{ + __atomic_release_fence(); + return atomic64_fetch_dec_relaxed(v); +} +#define atomic64_fetch_dec_release atomic64_fetch_dec_release +#endif + +#ifndef atomic64_fetch_dec +static inline s64 +atomic64_fetch_dec(atomic64_t *v) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_fetch_dec_relaxed(v); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_fetch_dec atomic64_fetch_dec +#endif + +#endif /* atomic64_fetch_dec_relaxed */ + +#ifndef atomic64_fetch_and_relaxed +#define atomic64_fetch_and_acquire atomic64_fetch_and +#define atomic64_fetch_and_release atomic64_fetch_and +#define atomic64_fetch_and_relaxed atomic64_fetch_and +#else /* atomic64_fetch_and_relaxed */ + +#ifndef atomic64_fetch_and_acquire +static inline s64 +atomic64_fetch_and_acquire(s64 i, atomic64_t *v) +{ + s64 ret = atomic64_fetch_and_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_fetch_and_acquire atomic64_fetch_and_acquire +#endif + +#ifndef atomic64_fetch_and_release +static inline s64 +atomic64_fetch_and_release(s64 i, atomic64_t *v) +{ + __atomic_release_fence(); + return atomic64_fetch_and_relaxed(i, v); +} +#define atomic64_fetch_and_release atomic64_fetch_and_release +#endif + +#ifndef atomic64_fetch_and +static inline s64 +atomic64_fetch_and(s64 i, atomic64_t *v) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_fetch_and_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_fetch_and atomic64_fetch_and +#endif + +#endif /* atomic64_fetch_and_relaxed */ + +#ifndef atomic64_andnot +static inline void +atomic64_andnot(s64 i, atomic64_t *v) +{ + atomic64_and(~i, v); +} +#define atomic64_andnot atomic64_andnot +#endif + +#ifndef atomic64_fetch_andnot_relaxed +#ifdef atomic64_fetch_andnot +#define atomic64_fetch_andnot_acquire atomic64_fetch_andnot +#define atomic64_fetch_andnot_release atomic64_fetch_andnot +#define atomic64_fetch_andnot_relaxed atomic64_fetch_andnot +#endif /* atomic64_fetch_andnot */ + +#ifndef atomic64_fetch_andnot +static inline s64 +atomic64_fetch_andnot(s64 i, atomic64_t *v) +{ + return atomic64_fetch_and(~i, v); +} +#define atomic64_fetch_andnot atomic64_fetch_andnot +#endif + +#ifndef atomic64_fetch_andnot_acquire +static inline s64 +atomic64_fetch_andnot_acquire(s64 i, atomic64_t *v) +{ + return atomic64_fetch_and_acquire(~i, v); +} +#define atomic64_fetch_andnot_acquire atomic64_fetch_andnot_acquire +#endif + +#ifndef atomic64_fetch_andnot_release +static inline s64 +atomic64_fetch_andnot_release(s64 i, atomic64_t *v) +{ + return atomic64_fetch_and_release(~i, v); +} +#define atomic64_fetch_andnot_release atomic64_fetch_andnot_release +#endif + +#ifndef atomic64_fetch_andnot_relaxed +static inline s64 +atomic64_fetch_andnot_relaxed(s64 i, atomic64_t *v) +{ + return atomic64_fetch_and_relaxed(~i, v); +} +#define atomic64_fetch_andnot_relaxed atomic64_fetch_andnot_relaxed +#endif + +#else /* atomic64_fetch_andnot_relaxed */ + +#ifndef atomic64_fetch_andnot_acquire +static inline s64 +atomic64_fetch_andnot_acquire(s64 i, atomic64_t *v) +{ + s64 ret = atomic64_fetch_andnot_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_fetch_andnot_acquire atomic64_fetch_andnot_acquire +#endif + +#ifndef atomic64_fetch_andnot_release +static inline s64 +atomic64_fetch_andnot_release(s64 i, atomic64_t *v) +{ + __atomic_release_fence(); + return atomic64_fetch_andnot_relaxed(i, v); +} +#define atomic64_fetch_andnot_release atomic64_fetch_andnot_release +#endif + +#ifndef atomic64_fetch_andnot +static inline s64 +atomic64_fetch_andnot(s64 i, atomic64_t *v) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_fetch_andnot_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_fetch_andnot atomic64_fetch_andnot +#endif + +#endif /* atomic64_fetch_andnot_relaxed */ + +#ifndef atomic64_fetch_or_relaxed +#define atomic64_fetch_or_acquire atomic64_fetch_or +#define atomic64_fetch_or_release atomic64_fetch_or +#define atomic64_fetch_or_relaxed atomic64_fetch_or +#else /* atomic64_fetch_or_relaxed */ + +#ifndef atomic64_fetch_or_acquire +static inline s64 +atomic64_fetch_or_acquire(s64 i, atomic64_t *v) +{ + s64 ret = atomic64_fetch_or_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_fetch_or_acquire atomic64_fetch_or_acquire +#endif + +#ifndef atomic64_fetch_or_release +static inline s64 +atomic64_fetch_or_release(s64 i, atomic64_t *v) +{ + __atomic_release_fence(); + return atomic64_fetch_or_relaxed(i, v); +} +#define atomic64_fetch_or_release atomic64_fetch_or_release +#endif + +#ifndef atomic64_fetch_or +static inline s64 +atomic64_fetch_or(s64 i, atomic64_t *v) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_fetch_or_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_fetch_or atomic64_fetch_or +#endif + +#endif /* atomic64_fetch_or_relaxed */ + +#ifndef atomic64_fetch_xor_relaxed +#define atomic64_fetch_xor_acquire atomic64_fetch_xor +#define atomic64_fetch_xor_release atomic64_fetch_xor +#define atomic64_fetch_xor_relaxed atomic64_fetch_xor +#else /* atomic64_fetch_xor_relaxed */ + +#ifndef atomic64_fetch_xor_acquire +static inline s64 +atomic64_fetch_xor_acquire(s64 i, atomic64_t *v) +{ + s64 ret = atomic64_fetch_xor_relaxed(i, v); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_fetch_xor_acquire atomic64_fetch_xor_acquire +#endif + +#ifndef atomic64_fetch_xor_release +static inline s64 +atomic64_fetch_xor_release(s64 i, atomic64_t *v) +{ + __atomic_release_fence(); + return atomic64_fetch_xor_relaxed(i, v); +} +#define atomic64_fetch_xor_release atomic64_fetch_xor_release +#endif + +#ifndef atomic64_fetch_xor +static inline s64 +atomic64_fetch_xor(s64 i, atomic64_t *v) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_fetch_xor_relaxed(i, v); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_fetch_xor atomic64_fetch_xor +#endif + +#endif /* atomic64_fetch_xor_relaxed */ + +#ifndef atomic64_xchg_relaxed +#define atomic64_xchg_acquire atomic64_xchg +#define atomic64_xchg_release atomic64_xchg +#define atomic64_xchg_relaxed atomic64_xchg +#else /* atomic64_xchg_relaxed */ + +#ifndef atomic64_xchg_acquire +static inline s64 +atomic64_xchg_acquire(atomic64_t *v, s64 i) +{ + s64 ret = atomic64_xchg_relaxed(v, i); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_xchg_acquire atomic64_xchg_acquire +#endif + +#ifndef atomic64_xchg_release +static inline s64 +atomic64_xchg_release(atomic64_t *v, s64 i) +{ + __atomic_release_fence(); + return atomic64_xchg_relaxed(v, i); +} +#define atomic64_xchg_release atomic64_xchg_release +#endif + +#ifndef atomic64_xchg +static inline s64 +atomic64_xchg(atomic64_t *v, s64 i) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_xchg_relaxed(v, i); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_xchg atomic64_xchg +#endif + +#endif /* atomic64_xchg_relaxed */ + +#ifndef atomic64_cmpxchg_relaxed +#define atomic64_cmpxchg_acquire atomic64_cmpxchg +#define atomic64_cmpxchg_release atomic64_cmpxchg +#define atomic64_cmpxchg_relaxed atomic64_cmpxchg +#else /* atomic64_cmpxchg_relaxed */ + +#ifndef atomic64_cmpxchg_acquire +static inline s64 +atomic64_cmpxchg_acquire(atomic64_t *v, s64 old, s64 new) +{ + s64 ret = atomic64_cmpxchg_relaxed(v, old, new); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_cmpxchg_acquire atomic64_cmpxchg_acquire +#endif + +#ifndef atomic64_cmpxchg_release +static inline s64 +atomic64_cmpxchg_release(atomic64_t *v, s64 old, s64 new) +{ + __atomic_release_fence(); + return atomic64_cmpxchg_relaxed(v, old, new); +} +#define atomic64_cmpxchg_release atomic64_cmpxchg_release +#endif + +#ifndef atomic64_cmpxchg +static inline s64 +atomic64_cmpxchg(atomic64_t *v, s64 old, s64 new) +{ + s64 ret; + __atomic_pre_full_fence(); + ret = atomic64_cmpxchg_relaxed(v, old, new); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_cmpxchg atomic64_cmpxchg +#endif + +#endif /* atomic64_cmpxchg_relaxed */ + +#ifndef atomic64_try_cmpxchg_relaxed +#ifdef atomic64_try_cmpxchg +#define atomic64_try_cmpxchg_acquire atomic64_try_cmpxchg +#define atomic64_try_cmpxchg_release atomic64_try_cmpxchg +#define atomic64_try_cmpxchg_relaxed atomic64_try_cmpxchg +#endif /* atomic64_try_cmpxchg */ + +#ifndef atomic64_try_cmpxchg +static inline bool +atomic64_try_cmpxchg(atomic64_t *v, s64 *old, s64 new) +{ + s64 r, o = *old; + r = atomic64_cmpxchg(v, o, new); + if (unlikely(r != o)) + *old = r; + return likely(r == o); +} +#define atomic64_try_cmpxchg atomic64_try_cmpxchg +#endif + +#ifndef atomic64_try_cmpxchg_acquire +static inline bool +atomic64_try_cmpxchg_acquire(atomic64_t *v, s64 *old, s64 new) +{ + s64 r, o = *old; + r = atomic64_cmpxchg_acquire(v, o, new); + if (unlikely(r != o)) + *old = r; + return likely(r == o); +} +#define atomic64_try_cmpxchg_acquire atomic64_try_cmpxchg_acquire +#endif + +#ifndef atomic64_try_cmpxchg_release +static inline bool +atomic64_try_cmpxchg_release(atomic64_t *v, s64 *old, s64 new) +{ + s64 r, o = *old; + r = atomic64_cmpxchg_release(v, o, new); + if (unlikely(r != o)) + *old = r; + return likely(r == o); +} +#define atomic64_try_cmpxchg_release atomic64_try_cmpxchg_release +#endif + +#ifndef atomic64_try_cmpxchg_relaxed +static inline bool +atomic64_try_cmpxchg_relaxed(atomic64_t *v, s64 *old, s64 new) +{ + s64 r, o = *old; + r = atomic64_cmpxchg_relaxed(v, o, new); + if (unlikely(r != o)) + *old = r; + return likely(r == o); +} +#define atomic64_try_cmpxchg_relaxed atomic64_try_cmpxchg_relaxed +#endif + +#else /* atomic64_try_cmpxchg_relaxed */ + +#ifndef atomic64_try_cmpxchg_acquire +static inline bool +atomic64_try_cmpxchg_acquire(atomic64_t *v, s64 *old, s64 new) +{ + bool ret = atomic64_try_cmpxchg_relaxed(v, old, new); + __atomic_acquire_fence(); + return ret; +} +#define atomic64_try_cmpxchg_acquire atomic64_try_cmpxchg_acquire +#endif + +#ifndef atomic64_try_cmpxchg_release +static inline bool +atomic64_try_cmpxchg_release(atomic64_t *v, s64 *old, s64 new) +{ + __atomic_release_fence(); + return atomic64_try_cmpxchg_relaxed(v, old, new); +} +#define atomic64_try_cmpxchg_release atomic64_try_cmpxchg_release +#endif + +#ifndef atomic64_try_cmpxchg +static inline bool +atomic64_try_cmpxchg(atomic64_t *v, s64 *old, s64 new) +{ + bool ret; + __atomic_pre_full_fence(); + ret = atomic64_try_cmpxchg_relaxed(v, old, new); + __atomic_post_full_fence(); + return ret; +} +#define atomic64_try_cmpxchg atomic64_try_cmpxchg +#endif + +#endif /* atomic64_try_cmpxchg_relaxed */ + +#ifndef atomic64_sub_and_test +/** + * atomic64_sub_and_test - subtract value from variable and test result + * @i: integer value to subtract + * @v: pointer of type atomic64_t + * + * Atomically subtracts @i from @v and returns + * true if the result is zero, or false for all + * other cases. + */ +static inline bool +atomic64_sub_and_test(s64 i, atomic64_t *v) +{ + return atomic64_sub_return(i, v) == 0; +} +#define atomic64_sub_and_test atomic64_sub_and_test +#endif + +#ifndef atomic64_dec_and_test +/** + * atomic64_dec_and_test - decrement and test + * @v: pointer of type atomic64_t + * + * Atomically decrements @v by 1 and + * returns true if the result is 0, or false for all other + * cases. + */ +static inline bool +atomic64_dec_and_test(atomic64_t *v) +{ + return atomic64_dec_return(v) == 0; +} +#define atomic64_dec_and_test atomic64_dec_and_test +#endif + +#ifndef atomic64_inc_and_test +/** + * atomic64_inc_and_test - increment and test + * @v: pointer of type atomic64_t + * + * Atomically increments @v by 1 + * and returns true if the result is zero, or false for all + * other cases. + */ +static inline bool +atomic64_inc_and_test(atomic64_t *v) +{ + return atomic64_inc_return(v) == 0; +} +#define atomic64_inc_and_test atomic64_inc_and_test +#endif + +#ifndef atomic64_add_negative +/** + * atomic64_add_negative - add and test if negative + * @i: integer value to add + * @v: pointer of type atomic64_t + * + * Atomically adds @i to @v and returns true + * if the result is negative, or false when + * result is greater than or equal to zero. + */ +static inline bool +atomic64_add_negative(s64 i, atomic64_t *v) +{ + return atomic64_add_return(i, v) < 0; +} +#define atomic64_add_negative atomic64_add_negative +#endif + +#ifndef atomic64_fetch_add_unless +/** + * atomic64_fetch_add_unless - add unless the number is already a given value + * @v: pointer of type atomic64_t + * @a: the amount to add to v... + * @u: ...unless v is equal to u. + * + * Atomically adds @a to @v, so long as @v was not already @u. + * Returns original value of @v + */ +static inline s64 +atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u) +{ + s64 c = atomic64_read(v); + + do { + if (unlikely(c == u)) + break; + } while (!atomic64_try_cmpxchg(v, &c, c + a)); + + return c; +} +#define atomic64_fetch_add_unless atomic64_fetch_add_unless +#endif + +#ifndef atomic64_add_unless +/** + * atomic64_add_unless - add unless the number is already a given value + * @v: pointer of type atomic64_t + * @a: the amount to add to v... + * @u: ...unless v is equal to u. + * + * Atomically adds @a to @v, if @v was not already @u. + * Returns true if the addition was done. + */ +static inline bool +atomic64_add_unless(atomic64_t *v, s64 a, s64 u) +{ + return atomic64_fetch_add_unless(v, a, u) != u; +} +#define atomic64_add_unless atomic64_add_unless +#endif + +#ifndef atomic64_inc_not_zero +/** + * atomic64_inc_not_zero - increment unless the number is zero + * @v: pointer of type atomic64_t + * + * Atomically increments @v by 1, if @v is non-zero. + * Returns true if the increment was done. + */ +static inline bool +atomic64_inc_not_zero(atomic64_t *v) +{ + return atomic64_add_unless(v, 1, 0); +} +#define atomic64_inc_not_zero atomic64_inc_not_zero +#endif + +#ifndef atomic64_inc_unless_negative +static inline bool +atomic64_inc_unless_negative(atomic64_t *v) +{ + s64 c = atomic64_read(v); + + do { + if (unlikely(c < 0)) + return false; + } while (!atomic64_try_cmpxchg(v, &c, c + 1)); + + return true; +} +#define atomic64_inc_unless_negative atomic64_inc_unless_negative +#endif + +#ifndef atomic64_dec_unless_positive +static inline bool +atomic64_dec_unless_positive(atomic64_t *v) +{ + s64 c = atomic64_read(v); + + do { + if (unlikely(c > 0)) + return false; + } while (!atomic64_try_cmpxchg(v, &c, c - 1)); + + return true; +} +#define atomic64_dec_unless_positive atomic64_dec_unless_positive +#endif + +#ifndef atomic64_dec_if_positive +static inline s64 +atomic64_dec_if_positive(atomic64_t *v) +{ + s64 dec, c = atomic64_read(v); + + do { + dec = c - 1; + if (unlikely(dec < 0)) + break; + } while (!atomic64_try_cmpxchg(v, &c, dec)); + + return dec; +} +#define atomic64_dec_if_positive atomic64_dec_if_positive +#endif + +#define atomic64_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c)) +#define atomic64_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c)) + +#endif /* _LINUX_ATOMIC_FALLBACK_H */ +// 25de4a2804d70f57e994fe3b419148658bb5378a diff --git a/include/linux/atomic.h b/include/linux/atomic.h index 1e8e88bdaf09..4c0d009a46f0 100644 --- a/include/linux/atomic.h +++ b/include/linux/atomic.h @@ -25,14 +25,6 @@ * See Documentation/memory-barriers.txt for ACQUIRE/RELEASE definitions. */ -#ifndef atomic_read_acquire -#define atomic_read_acquire(v) smp_load_acquire(&(v)->counter) -#endif - -#ifndef atomic_set_release -#define atomic_set_release(v, i) smp_store_release(&(v)->counter, (i)) -#endif - /* * The idea here is to build acquire/release variants by adding explicit * barriers on top of the relaxed variant. In the case where the relaxed @@ -79,1238 +71,7 @@ __ret; \ }) -/* atomic_add_return_relaxed */ -#ifndef atomic_add_return_relaxed -#define atomic_add_return_relaxed atomic_add_return -#define atomic_add_return_acquire atomic_add_return -#define atomic_add_return_release atomic_add_return - -#else /* atomic_add_return_relaxed */ - -#ifndef atomic_add_return_acquire -#define atomic_add_return_acquire(...) \ - __atomic_op_acquire(atomic_add_return, __VA_ARGS__) -#endif - -#ifndef atomic_add_return_release -#define atomic_add_return_release(...) \ - __atomic_op_release(atomic_add_return, __VA_ARGS__) -#endif - -#ifndef atomic_add_return -#define atomic_add_return(...) \ - __atomic_op_fence(atomic_add_return, __VA_ARGS__) -#endif -#endif /* atomic_add_return_relaxed */ - -#ifndef atomic_inc -#define atomic_inc(v) atomic_add(1, (v)) -#endif - -/* atomic_inc_return_relaxed */ -#ifndef atomic_inc_return_relaxed - -#ifndef atomic_inc_return -#define atomic_inc_return(v) atomic_add_return(1, (v)) -#define atomic_inc_return_relaxed(v) atomic_add_return_relaxed(1, (v)) -#define atomic_inc_return_acquire(v) atomic_add_return_acquire(1, (v)) -#define atomic_inc_return_release(v) atomic_add_return_release(1, (v)) -#else /* atomic_inc_return */ -#define atomic_inc_return_relaxed atomic_inc_return -#define atomic_inc_return_acquire atomic_inc_return -#define atomic_inc_return_release atomic_inc_return -#endif /* atomic_inc_return */ - -#else /* atomic_inc_return_relaxed */ - -#ifndef atomic_inc_return_acquire -#define atomic_inc_return_acquire(...) \ - __atomic_op_acquire(atomic_inc_return, __VA_ARGS__) -#endif - -#ifndef atomic_inc_return_release -#define atomic_inc_return_release(...) \ - __atomic_op_release(atomic_inc_return, __VA_ARGS__) -#endif - -#ifndef atomic_inc_return -#define atomic_inc_return(...) \ - __atomic_op_fence(atomic_inc_return, __VA_ARGS__) -#endif -#endif /* atomic_inc_return_relaxed */ - -/* atomic_sub_return_relaxed */ -#ifndef atomic_sub_return_relaxed -#define atomic_sub_return_relaxed atomic_sub_return -#define atomic_sub_return_acquire atomic_sub_return -#define atomic_sub_return_release atomic_sub_return - -#else /* atomic_sub_return_relaxed */ - -#ifndef atomic_sub_return_acquire -#define atomic_sub_return_acquire(...) \ - __atomic_op_acquire(atomic_sub_return, __VA_ARGS__) -#endif - -#ifndef atomic_sub_return_release -#define atomic_sub_return_release(...) \ - __atomic_op_release(atomic_sub_return, __VA_ARGS__) -#endif - -#ifndef atomic_sub_return -#define atomic_sub_return(...) \ - __atomic_op_fence(atomic_sub_return, __VA_ARGS__) -#endif -#endif /* atomic_sub_return_relaxed */ - -#ifndef atomic_dec -#define atomic_dec(v) atomic_sub(1, (v)) -#endif - -/* atomic_dec_return_relaxed */ -#ifndef atomic_dec_return_relaxed - -#ifndef atomic_dec_return -#define atomic_dec_return(v) atomic_sub_return(1, (v)) -#define atomic_dec_return_relaxed(v) atomic_sub_return_relaxed(1, (v)) -#define atomic_dec_return_acquire(v) atomic_sub_return_acquire(1, (v)) -#define atomic_dec_return_release(v) atomic_sub_return_release(1, (v)) -#else /* atomic_dec_return */ -#define atomic_dec_return_relaxed atomic_dec_return -#define atomic_dec_return_acquire atomic_dec_return -#define atomic_dec_return_release atomic_dec_return -#endif /* atomic_dec_return */ - -#else /* atomic_dec_return_relaxed */ - -#ifndef atomic_dec_return_acquire -#define atomic_dec_return_acquire(...) \ - __atomic_op_acquire(atomic_dec_return, __VA_ARGS__) -#endif - -#ifndef atomic_dec_return_release -#define atomic_dec_return_release(...) \ - __atomic_op_release(atomic_dec_return, __VA_ARGS__) -#endif - -#ifndef atomic_dec_return -#define atomic_dec_return(...) \ - __atomic_op_fence(atomic_dec_return, __VA_ARGS__) -#endif -#endif /* atomic_dec_return_relaxed */ - - -/* atomic_fetch_add_relaxed */ -#ifndef atomic_fetch_add_relaxed -#define atomic_fetch_add_relaxed atomic_fetch_add -#define atomic_fetch_add_acquire atomic_fetch_add -#define atomic_fetch_add_release atomic_fetch_add - -#else /* atomic_fetch_add_relaxed */ - -#ifndef atomic_fetch_add_acquire -#define atomic_fetch_add_acquire(...) \ - __atomic_op_acquire(atomic_fetch_add, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_add_release -#define atomic_fetch_add_release(...) \ - __atomic_op_release(atomic_fetch_add, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_add -#define atomic_fetch_add(...) \ - __atomic_op_fence(atomic_fetch_add, __VA_ARGS__) -#endif -#endif /* atomic_fetch_add_relaxed */ - -/* atomic_fetch_inc_relaxed */ -#ifndef atomic_fetch_inc_relaxed - -#ifndef atomic_fetch_inc -#define atomic_fetch_inc(v) atomic_fetch_add(1, (v)) -#define atomic_fetch_inc_relaxed(v) atomic_fetch_add_relaxed(1, (v)) -#define atomic_fetch_inc_acquire(v) atomic_fetch_add_acquire(1, (v)) -#define atomic_fetch_inc_release(v) atomic_fetch_add_release(1, (v)) -#else /* atomic_fetch_inc */ -#define atomic_fetch_inc_relaxed atomic_fetch_inc -#define atomic_fetch_inc_acquire atomic_fetch_inc -#define atomic_fetch_inc_release atomic_fetch_inc -#endif /* atomic_fetch_inc */ - -#else /* atomic_fetch_inc_relaxed */ - -#ifndef atomic_fetch_inc_acquire -#define atomic_fetch_inc_acquire(...) \ - __atomic_op_acquire(atomic_fetch_inc, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_inc_release -#define atomic_fetch_inc_release(...) \ - __atomic_op_release(atomic_fetch_inc, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_inc -#define atomic_fetch_inc(...) \ - __atomic_op_fence(atomic_fetch_inc, __VA_ARGS__) -#endif -#endif /* atomic_fetch_inc_relaxed */ - -/* atomic_fetch_sub_relaxed */ -#ifndef atomic_fetch_sub_relaxed -#define atomic_fetch_sub_relaxed atomic_fetch_sub -#define atomic_fetch_sub_acquire atomic_fetch_sub -#define atomic_fetch_sub_release atomic_fetch_sub - -#else /* atomic_fetch_sub_relaxed */ - -#ifndef atomic_fetch_sub_acquire -#define atomic_fetch_sub_acquire(...) \ - __atomic_op_acquire(atomic_fetch_sub, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_sub_release -#define atomic_fetch_sub_release(...) \ - __atomic_op_release(atomic_fetch_sub, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_sub -#define atomic_fetch_sub(...) \ - __atomic_op_fence(atomic_fetch_sub, __VA_ARGS__) -#endif -#endif /* atomic_fetch_sub_relaxed */ - -/* atomic_fetch_dec_relaxed */ -#ifndef atomic_fetch_dec_relaxed - -#ifndef atomic_fetch_dec -#define atomic_fetch_dec(v) atomic_fetch_sub(1, (v)) -#define atomic_fetch_dec_relaxed(v) atomic_fetch_sub_relaxed(1, (v)) -#define atomic_fetch_dec_acquire(v) atomic_fetch_sub_acquire(1, (v)) -#define atomic_fetch_dec_release(v) atomic_fetch_sub_release(1, (v)) -#else /* atomic_fetch_dec */ -#define atomic_fetch_dec_relaxed atomic_fetch_dec -#define atomic_fetch_dec_acquire atomic_fetch_dec -#define atomic_fetch_dec_release atomic_fetch_dec -#endif /* atomic_fetch_dec */ - -#else /* atomic_fetch_dec_relaxed */ - -#ifndef atomic_fetch_dec_acquire -#define atomic_fetch_dec_acquire(...) \ - __atomic_op_acquire(atomic_fetch_dec, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_dec_release -#define atomic_fetch_dec_release(...) \ - __atomic_op_release(atomic_fetch_dec, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_dec -#define atomic_fetch_dec(...) \ - __atomic_op_fence(atomic_fetch_dec, __VA_ARGS__) -#endif -#endif /* atomic_fetch_dec_relaxed */ - -/* atomic_fetch_or_relaxed */ -#ifndef atomic_fetch_or_relaxed -#define atomic_fetch_or_relaxed atomic_fetch_or -#define atomic_fetch_or_acquire atomic_fetch_or -#define atomic_fetch_or_release atomic_fetch_or - -#else /* atomic_fetch_or_relaxed */ - -#ifndef atomic_fetch_or_acquire -#define atomic_fetch_or_acquire(...) \ - __atomic_op_acquire(atomic_fetch_or, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_or_release -#define atomic_fetch_or_release(...) \ - __atomic_op_release(atomic_fetch_or, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_or -#define atomic_fetch_or(...) \ - __atomic_op_fence(atomic_fetch_or, __VA_ARGS__) -#endif -#endif /* atomic_fetch_or_relaxed */ - -/* atomic_fetch_and_relaxed */ -#ifndef atomic_fetch_and_relaxed -#define atomic_fetch_and_relaxed atomic_fetch_and -#define atomic_fetch_and_acquire atomic_fetch_and -#define atomic_fetch_and_release atomic_fetch_and - -#else /* atomic_fetch_and_relaxed */ - -#ifndef atomic_fetch_and_acquire -#define atomic_fetch_and_acquire(...) \ - __atomic_op_acquire(atomic_fetch_and, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_and_release -#define atomic_fetch_and_release(...) \ - __atomic_op_release(atomic_fetch_and, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_and -#define atomic_fetch_and(...) \ - __atomic_op_fence(atomic_fetch_and, __VA_ARGS__) -#endif -#endif /* atomic_fetch_and_relaxed */ - -#ifndef atomic_andnot -#define atomic_andnot(i, v) atomic_and(~(int)(i), (v)) -#endif - -#ifndef atomic_fetch_andnot_relaxed - -#ifndef atomic_fetch_andnot -#define atomic_fetch_andnot(i, v) atomic_fetch_and(~(int)(i), (v)) -#define atomic_fetch_andnot_relaxed(i, v) atomic_fetch_and_relaxed(~(int)(i), (v)) -#define atomic_fetch_andnot_acquire(i, v) atomic_fetch_and_acquire(~(int)(i), (v)) -#define atomic_fetch_andnot_release(i, v) atomic_fetch_and_release(~(int)(i), (v)) -#else /* atomic_fetch_andnot */ -#define atomic_fetch_andnot_relaxed atomic_fetch_andnot -#define atomic_fetch_andnot_acquire atomic_fetch_andnot -#define atomic_fetch_andnot_release atomic_fetch_andnot -#endif /* atomic_fetch_andnot */ - -#else /* atomic_fetch_andnot_relaxed */ - -#ifndef atomic_fetch_andnot_acquire -#define atomic_fetch_andnot_acquire(...) \ - __atomic_op_acquire(atomic_fetch_andnot, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_andnot_release -#define atomic_fetch_andnot_release(...) \ - __atomic_op_release(atomic_fetch_andnot, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_andnot -#define atomic_fetch_andnot(...) \ - __atomic_op_fence(atomic_fetch_andnot, __VA_ARGS__) -#endif -#endif /* atomic_fetch_andnot_relaxed */ - -/* atomic_fetch_xor_relaxed */ -#ifndef atomic_fetch_xor_relaxed -#define atomic_fetch_xor_relaxed atomic_fetch_xor -#define atomic_fetch_xor_acquire atomic_fetch_xor -#define atomic_fetch_xor_release atomic_fetch_xor - -#else /* atomic_fetch_xor_relaxed */ - -#ifndef atomic_fetch_xor_acquire -#define atomic_fetch_xor_acquire(...) \ - __atomic_op_acquire(atomic_fetch_xor, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_xor_release -#define atomic_fetch_xor_release(...) \ - __atomic_op_release(atomic_fetch_xor, __VA_ARGS__) -#endif - -#ifndef atomic_fetch_xor -#define atomic_fetch_xor(...) \ - __atomic_op_fence(atomic_fetch_xor, __VA_ARGS__) -#endif -#endif /* atomic_fetch_xor_relaxed */ - - -/* atomic_xchg_relaxed */ -#ifndef atomic_xchg_relaxed -#define atomic_xchg_relaxed atomic_xchg -#define atomic_xchg_acquire atomic_xchg -#define atomic_xchg_release atomic_xchg - -#else /* atomic_xchg_relaxed */ - -#ifndef atomic_xchg_acquire -#define atomic_xchg_acquire(...) \ - __atomic_op_acquire(atomic_xchg, __VA_ARGS__) -#endif - -#ifndef atomic_xchg_release -#define atomic_xchg_release(...) \ - __atomic_op_release(atomic_xchg, __VA_ARGS__) -#endif - -#ifndef atomic_xchg -#define atomic_xchg(...) \ - __atomic_op_fence(atomic_xchg, __VA_ARGS__) -#endif -#endif /* atomic_xchg_relaxed */ - -/* atomic_cmpxchg_relaxed */ -#ifndef atomic_cmpxchg_relaxed -#define atomic_cmpxchg_relaxed atomic_cmpxchg -#define atomic_cmpxchg_acquire atomic_cmpxchg -#define atomic_cmpxchg_release atomic_cmpxchg - -#else /* atomic_cmpxchg_relaxed */ - -#ifndef atomic_cmpxchg_acquire -#define atomic_cmpxchg_acquire(...) \ - __atomic_op_acquire(atomic_cmpxchg, __VA_ARGS__) -#endif - -#ifndef atomic_cmpxchg_release -#define atomic_cmpxchg_release(...) \ - __atomic_op_release(atomic_cmpxchg, __VA_ARGS__) -#endif - -#ifndef atomic_cmpxchg -#define atomic_cmpxchg(...) \ - __atomic_op_fence(atomic_cmpxchg, __VA_ARGS__) -#endif -#endif /* atomic_cmpxchg_relaxed */ - -#ifndef atomic_try_cmpxchg - -#define __atomic_try_cmpxchg(type, _p, _po, _n) \ -({ \ - typeof(_po) __po = (_po); \ - typeof(*(_po)) __r, __o = *__po; \ - __r = atomic_cmpxchg##type((_p), __o, (_n)); \ - if (unlikely(__r != __o)) \ - *__po = __r; \ - likely(__r == __o); \ -}) - -#define atomic_try_cmpxchg(_p, _po, _n) __atomic_try_cmpxchg(, _p, _po, _n) -#define atomic_try_cmpxchg_relaxed(_p, _po, _n) __atomic_try_cmpxchg(_relaxed, _p, _po, _n) -#define atomic_try_cmpxchg_acquire(_p, _po, _n) __atomic_try_cmpxchg(_acquire, _p, _po, _n) -#define atomic_try_cmpxchg_release(_p, _po, _n) __atomic_try_cmpxchg(_release, _p, _po, _n) - -#else /* atomic_try_cmpxchg */ -#define atomic_try_cmpxchg_relaxed atomic_try_cmpxchg -#define atomic_try_cmpxchg_acquire atomic_try_cmpxchg -#define atomic_try_cmpxchg_release atomic_try_cmpxchg -#endif /* atomic_try_cmpxchg */ - -/* cmpxchg_relaxed */ -#ifndef cmpxchg_relaxed -#define cmpxchg_relaxed cmpxchg -#define cmpxchg_acquire cmpxchg -#define cmpxchg_release cmpxchg - -#else /* cmpxchg_relaxed */ - -#ifndef cmpxchg_acquire -#define cmpxchg_acquire(...) \ - __atomic_op_acquire(cmpxchg, __VA_ARGS__) -#endif - -#ifndef cmpxchg_release -#define cmpxchg_release(...) \ - __atomic_op_release(cmpxchg, __VA_ARGS__) -#endif - -#ifndef cmpxchg -#define cmpxchg(...) \ - __atomic_op_fence(cmpxchg, __VA_ARGS__) -#endif -#endif /* cmpxchg_relaxed */ - -/* cmpxchg64_relaxed */ -#ifndef cmpxchg64_relaxed -#define cmpxchg64_relaxed cmpxchg64 -#define cmpxchg64_acquire cmpxchg64 -#define cmpxchg64_release cmpxchg64 - -#else /* cmpxchg64_relaxed */ - -#ifndef cmpxchg64_acquire -#define cmpxchg64_acquire(...) \ - __atomic_op_acquire(cmpxchg64, __VA_ARGS__) -#endif - -#ifndef cmpxchg64_release -#define cmpxchg64_release(...) \ - __atomic_op_release(cmpxchg64, __VA_ARGS__) -#endif - -#ifndef cmpxchg64 -#define cmpxchg64(...) \ - __atomic_op_fence(cmpxchg64, __VA_ARGS__) -#endif -#endif /* cmpxchg64_relaxed */ - -/* xchg_relaxed */ -#ifndef xchg_relaxed -#define xchg_relaxed xchg -#define xchg_acquire xchg -#define xchg_release xchg - -#else /* xchg_relaxed */ - -#ifndef xchg_acquire -#define xchg_acquire(...) __atomic_op_acquire(xchg, __VA_ARGS__) -#endif - -#ifndef xchg_release -#define xchg_release(...) __atomic_op_release(xchg, __VA_ARGS__) -#endif - -#ifndef xchg -#define xchg(...) __atomic_op_fence(xchg, __VA_ARGS__) -#endif -#endif /* xchg_relaxed */ - -/** - * atomic_fetch_add_unless - add unless the number is already a given value - * @v: pointer of type atomic_t - * @a: the amount to add to v... - * @u: ...unless v is equal to u. - * - * Atomically adds @a to @v, if @v was not already @u. - * Returns the original value of @v. - */ -#ifndef atomic_fetch_add_unless -static inline int atomic_fetch_add_unless(atomic_t *v, int a, int u) -{ - int c = atomic_read(v); - - do { - if (unlikely(c == u)) - break; - } while (!atomic_try_cmpxchg(v, &c, c + a)); - - return c; -} -#endif - -/** - * atomic_add_unless - add unless the number is already a given value - * @v: pointer of type atomic_t - * @a: the amount to add to v... - * @u: ...unless v is equal to u. - * - * Atomically adds @a to @v, if @v was not already @u. - * Returns true if the addition was done. - */ -static inline bool atomic_add_unless(atomic_t *v, int a, int u) -{ - return atomic_fetch_add_unless(v, a, u) != u; -} - -/** - * atomic_inc_not_zero - increment unless the number is zero - * @v: pointer of type atomic_t - * - * Atomically increments @v by 1, if @v is non-zero. - * Returns true if the increment was done. - */ -#ifndef atomic_inc_not_zero -#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) -#endif - -/** - * atomic_inc_and_test - increment and test - * @v: pointer of type atomic_t - * - * Atomically increments @v by 1 - * and returns true if the result is zero, or false for all - * other cases. - */ -#ifndef atomic_inc_and_test -static inline bool atomic_inc_and_test(atomic_t *v) -{ - return atomic_inc_return(v) == 0; -} -#endif - -/** - * atomic_dec_and_test - decrement and test - * @v: pointer of type atomic_t - * - * Atomically decrements @v by 1 and - * returns true if the result is 0, or false for all other - * cases. - */ -#ifndef atomic_dec_and_test -static inline bool atomic_dec_and_test(atomic_t *v) -{ - return atomic_dec_return(v) == 0; -} -#endif - -/** - * atomic_sub_and_test - subtract value from variable and test result - * @i: integer value to subtract - * @v: pointer of type atomic_t - * - * Atomically subtracts @i from @v and returns - * true if the result is zero, or false for all - * other cases. - */ -#ifndef atomic_sub_and_test -static inline bool atomic_sub_and_test(int i, atomic_t *v) -{ - return atomic_sub_return(i, v) == 0; -} -#endif - -/** - * atomic_add_negative - add and test if negative - * @i: integer value to add - * @v: pointer of type atomic_t - * - * Atomically adds @i to @v and returns true - * if the result is negative, or false when - * result is greater than or equal to zero. - */ -#ifndef atomic_add_negative -static inline bool atomic_add_negative(int i, atomic_t *v) -{ - return atomic_add_return(i, v) < 0; -} -#endif - -#ifndef atomic_inc_unless_negative -static inline bool atomic_inc_unless_negative(atomic_t *v) -{ - int c = atomic_read(v); - - do { - if (unlikely(c < 0)) - return false; - } while (!atomic_try_cmpxchg(v, &c, c + 1)); - - return true; -} -#endif - -#ifndef atomic_dec_unless_positive -static inline bool atomic_dec_unless_positive(atomic_t *v) -{ - int c = atomic_read(v); - - do { - if (unlikely(c > 0)) - return false; - } while (!atomic_try_cmpxchg(v, &c, c - 1)); - - return true; -} -#endif - -/* - * atomic_dec_if_positive - decrement by 1 if old value positive - * @v: pointer of type atomic_t - * - * The function returns the old value of *v minus 1, even if - * the atomic variable, v, was not decremented. - */ -#ifndef atomic_dec_if_positive -static inline int atomic_dec_if_positive(atomic_t *v) -{ - int dec, c = atomic_read(v); - - do { - dec = c - 1; - if (unlikely(dec < 0)) - break; - } while (!atomic_try_cmpxchg(v, &c, dec)); - - return dec; -} -#endif - -#define atomic_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c)) -#define atomic_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c)) - -#ifdef CONFIG_GENERIC_ATOMIC64 -#include <asm-generic/atomic64.h> -#endif - -#ifndef atomic64_read_acquire -#define atomic64_read_acquire(v) smp_load_acquire(&(v)->counter) -#endif - -#ifndef atomic64_set_release -#define atomic64_set_release(v, i) smp_store_release(&(v)->counter, (i)) -#endif - -/* atomic64_add_return_relaxed */ -#ifndef atomic64_add_return_relaxed -#define atomic64_add_return_relaxed atomic64_add_return -#define atomic64_add_return_acquire atomic64_add_return -#define atomic64_add_return_release atomic64_add_return - -#else /* atomic64_add_return_relaxed */ - -#ifndef atomic64_add_return_acquire -#define atomic64_add_return_acquire(...) \ - __atomic_op_acquire(atomic64_add_return, __VA_ARGS__) -#endif - -#ifndef atomic64_add_return_release -#define atomic64_add_return_release(...) \ - __atomic_op_release(atomic64_add_return, __VA_ARGS__) -#endif - -#ifndef atomic64_add_return -#define atomic64_add_return(...) \ - __atomic_op_fence(atomic64_add_return, __VA_ARGS__) -#endif -#endif /* atomic64_add_return_relaxed */ - -#ifndef atomic64_inc -#define atomic64_inc(v) atomic64_add(1, (v)) -#endif - -/* atomic64_inc_return_relaxed */ -#ifndef atomic64_inc_return_relaxed - -#ifndef atomic64_inc_return -#define atomic64_inc_return(v) atomic64_add_return(1, (v)) -#define atomic64_inc_return_relaxed(v) atomic64_add_return_relaxed(1, (v)) -#define atomic64_inc_return_acquire(v) atomic64_add_return_acquire(1, (v)) -#define atomic64_inc_return_release(v) atomic64_add_return_release(1, (v)) -#else /* atomic64_inc_return */ -#define atomic64_inc_return_relaxed atomic64_inc_return -#define atomic64_inc_return_acquire atomic64_inc_return -#define atomic64_inc_return_release atomic64_inc_return -#endif /* atomic64_inc_return */ - -#else /* atomic64_inc_return_relaxed */ - -#ifndef atomic64_inc_return_acquire -#define atomic64_inc_return_acquire(...) \ - __atomic_op_acquire(atomic64_inc_return, __VA_ARGS__) -#endif - -#ifndef atomic64_inc_return_release -#define atomic64_inc_return_release(...) \ - __atomic_op_release(atomic64_inc_return, __VA_ARGS__) -#endif - -#ifndef atomic64_inc_return -#define atomic64_inc_return(...) \ - __atomic_op_fence(atomic64_inc_return, __VA_ARGS__) -#endif -#endif /* atomic64_inc_return_relaxed */ - - -/* atomic64_sub_return_relaxed */ -#ifndef atomic64_sub_return_relaxed -#define atomic64_sub_return_relaxed atomic64_sub_return -#define atomic64_sub_return_acquire atomic64_sub_return -#define atomic64_sub_return_release atomic64_sub_return - -#else /* atomic64_sub_return_relaxed */ - -#ifndef atomic64_sub_return_acquire -#define atomic64_sub_return_acquire(...) \ - __atomic_op_acquire(atomic64_sub_return, __VA_ARGS__) -#endif - -#ifndef atomic64_sub_return_release -#define atomic64_sub_return_release(...) \ - __atomic_op_release(atomic64_sub_return, __VA_ARGS__) -#endif - -#ifndef atomic64_sub_return -#define atomic64_sub_return(...) \ - __atomic_op_fence(atomic64_sub_return, __VA_ARGS__) -#endif -#endif /* atomic64_sub_return_relaxed */ - -#ifndef atomic64_dec -#define atomic64_dec(v) atomic64_sub(1, (v)) -#endif - -/* atomic64_dec_return_relaxed */ -#ifndef atomic64_dec_return_relaxed - -#ifndef atomic64_dec_return -#define atomic64_dec_return(v) atomic64_sub_return(1, (v)) -#define atomic64_dec_return_relaxed(v) atomic64_sub_return_relaxed(1, (v)) -#define atomic64_dec_return_acquire(v) atomic64_sub_return_acquire(1, (v)) -#define atomic64_dec_return_release(v) atomic64_sub_return_release(1, (v)) -#else /* atomic64_dec_return */ -#define atomic64_dec_return_relaxed atomic64_dec_return -#define atomic64_dec_return_acquire atomic64_dec_return -#define atomic64_dec_return_release atomic64_dec_return -#endif /* atomic64_dec_return */ - -#else /* atomic64_dec_return_relaxed */ - -#ifndef atomic64_dec_return_acquire -#define atomic64_dec_return_acquire(...) \ - __atomic_op_acquire(atomic64_dec_return, __VA_ARGS__) -#endif - -#ifndef atomic64_dec_return_release -#define atomic64_dec_return_release(...) \ - __atomic_op_release(atomic64_dec_return, __VA_ARGS__) -#endif - -#ifndef atomic64_dec_return -#define atomic64_dec_return(...) \ - __atomic_op_fence(atomic64_dec_return, __VA_ARGS__) -#endif -#endif /* atomic64_dec_return_relaxed */ - - -/* atomic64_fetch_add_relaxed */ -#ifndef atomic64_fetch_add_relaxed -#define atomic64_fetch_add_relaxed atomic64_fetch_add -#define atomic64_fetch_add_acquire atomic64_fetch_add -#define atomic64_fetch_add_release atomic64_fetch_add - -#else /* atomic64_fetch_add_relaxed */ - -#ifndef atomic64_fetch_add_acquire -#define atomic64_fetch_add_acquire(...) \ - __atomic_op_acquire(atomic64_fetch_add, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_add_release -#define atomic64_fetch_add_release(...) \ - __atomic_op_release(atomic64_fetch_add, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_add -#define atomic64_fetch_add(...) \ - __atomic_op_fence(atomic64_fetch_add, __VA_ARGS__) -#endif -#endif /* atomic64_fetch_add_relaxed */ - -/* atomic64_fetch_inc_relaxed */ -#ifndef atomic64_fetch_inc_relaxed - -#ifndef atomic64_fetch_inc -#define atomic64_fetch_inc(v) atomic64_fetch_add(1, (v)) -#define atomic64_fetch_inc_relaxed(v) atomic64_fetch_add_relaxed(1, (v)) -#define atomic64_fetch_inc_acquire(v) atomic64_fetch_add_acquire(1, (v)) -#define atomic64_fetch_inc_release(v) atomic64_fetch_add_release(1, (v)) -#else /* atomic64_fetch_inc */ -#define atomic64_fetch_inc_relaxed atomic64_fetch_inc -#define atomic64_fetch_inc_acquire atomic64_fetch_inc -#define atomic64_fetch_inc_release atomic64_fetch_inc -#endif /* atomic64_fetch_inc */ - -#else /* atomic64_fetch_inc_relaxed */ - -#ifndef atomic64_fetch_inc_acquire -#define atomic64_fetch_inc_acquire(...) \ - __atomic_op_acquire(atomic64_fetch_inc, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_inc_release -#define atomic64_fetch_inc_release(...) \ - __atomic_op_release(atomic64_fetch_inc, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_inc -#define atomic64_fetch_inc(...) \ - __atomic_op_fence(atomic64_fetch_inc, __VA_ARGS__) -#endif -#endif /* atomic64_fetch_inc_relaxed */ - -/* atomic64_fetch_sub_relaxed */ -#ifndef atomic64_fetch_sub_relaxed -#define atomic64_fetch_sub_relaxed atomic64_fetch_sub -#define atomic64_fetch_sub_acquire atomic64_fetch_sub -#define atomic64_fetch_sub_release atomic64_fetch_sub - -#else /* atomic64_fetch_sub_relaxed */ - -#ifndef atomic64_fetch_sub_acquire -#define atomic64_fetch_sub_acquire(...) \ - __atomic_op_acquire(atomic64_fetch_sub, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_sub_release -#define atomic64_fetch_sub_release(...) \ - __atomic_op_release(atomic64_fetch_sub, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_sub -#define atomic64_fetch_sub(...) \ - __atomic_op_fence(atomic64_fetch_sub, __VA_ARGS__) -#endif -#endif /* atomic64_fetch_sub_relaxed */ - -/* atomic64_fetch_dec_relaxed */ -#ifndef atomic64_fetch_dec_relaxed - -#ifndef atomic64_fetch_dec -#define atomic64_fetch_dec(v) atomic64_fetch_sub(1, (v)) -#define atomic64_fetch_dec_relaxed(v) atomic64_fetch_sub_relaxed(1, (v)) -#define atomic64_fetch_dec_acquire(v) atomic64_fetch_sub_acquire(1, (v)) -#define atomic64_fetch_dec_release(v) atomic64_fetch_sub_release(1, (v)) -#else /* atomic64_fetch_dec */ -#define atomic64_fetch_dec_relaxed atomic64_fetch_dec -#define atomic64_fetch_dec_acquire atomic64_fetch_dec -#define atomic64_fetch_dec_release atomic64_fetch_dec -#endif /* atomic64_fetch_dec */ - -#else /* atomic64_fetch_dec_relaxed */ - -#ifndef atomic64_fetch_dec_acquire -#define atomic64_fetch_dec_acquire(...) \ - __atomic_op_acquire(atomic64_fetch_dec, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_dec_release -#define atomic64_fetch_dec_release(...) \ - __atomic_op_release(atomic64_fetch_dec, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_dec -#define atomic64_fetch_dec(...) \ - __atomic_op_fence(atomic64_fetch_dec, __VA_ARGS__) -#endif -#endif /* atomic64_fetch_dec_relaxed */ - -/* atomic64_fetch_or_relaxed */ -#ifndef atomic64_fetch_or_relaxed -#define atomic64_fetch_or_relaxed atomic64_fetch_or -#define atomic64_fetch_or_acquire atomic64_fetch_or -#define atomic64_fetch_or_release atomic64_fetch_or - -#else /* atomic64_fetch_or_relaxed */ - -#ifndef atomic64_fetch_or_acquire -#define atomic64_fetch_or_acquire(...) \ - __atomic_op_acquire(atomic64_fetch_or, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_or_release -#define atomic64_fetch_or_release(...) \ - __atomic_op_release(atomic64_fetch_or, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_or -#define atomic64_fetch_or(...) \ - __atomic_op_fence(atomic64_fetch_or, __VA_ARGS__) -#endif -#endif /* atomic64_fetch_or_relaxed */ - -/* atomic64_fetch_and_relaxed */ -#ifndef atomic64_fetch_and_relaxed -#define atomic64_fetch_and_relaxed atomic64_fetch_and -#define atomic64_fetch_and_acquire atomic64_fetch_and -#define atomic64_fetch_and_release atomic64_fetch_and - -#else /* atomic64_fetch_and_relaxed */ - -#ifndef atomic64_fetch_and_acquire -#define atomic64_fetch_and_acquire(...) \ - __atomic_op_acquire(atomic64_fetch_and, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_and_release -#define atomic64_fetch_and_release(...) \ - __atomic_op_release(atomic64_fetch_and, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_and -#define atomic64_fetch_and(...) \ - __atomic_op_fence(atomic64_fetch_and, __VA_ARGS__) -#endif -#endif /* atomic64_fetch_and_relaxed */ - -#ifndef atomic64_andnot -#define atomic64_andnot(i, v) atomic64_and(~(long long)(i), (v)) -#endif - -#ifndef atomic64_fetch_andnot_relaxed - -#ifndef atomic64_fetch_andnot -#define atomic64_fetch_andnot(i, v) atomic64_fetch_and(~(long long)(i), (v)) -#define atomic64_fetch_andnot_relaxed(i, v) atomic64_fetch_and_relaxed(~(long long)(i), (v)) -#define atomic64_fetch_andnot_acquire(i, v) atomic64_fetch_and_acquire(~(long long)(i), (v)) -#define atomic64_fetch_andnot_release(i, v) atomic64_fetch_and_release(~(long long)(i), (v)) -#else /* atomic64_fetch_andnot */ -#define atomic64_fetch_andnot_relaxed atomic64_fetch_andnot -#define atomic64_fetch_andnot_acquire atomic64_fetch_andnot -#define atomic64_fetch_andnot_release atomic64_fetch_andnot -#endif /* atomic64_fetch_andnot */ - -#else /* atomic64_fetch_andnot_relaxed */ - -#ifndef atomic64_fetch_andnot_acquire -#define atomic64_fetch_andnot_acquire(...) \ - __atomic_op_acquire(atomic64_fetch_andnot, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_andnot_release -#define atomic64_fetch_andnot_release(...) \ - __atomic_op_release(atomic64_fetch_andnot, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_andnot -#define atomic64_fetch_andnot(...) \ - __atomic_op_fence(atomic64_fetch_andnot, __VA_ARGS__) -#endif -#endif /* atomic64_fetch_andnot_relaxed */ - -/* atomic64_fetch_xor_relaxed */ -#ifndef atomic64_fetch_xor_relaxed -#define atomic64_fetch_xor_relaxed atomic64_fetch_xor -#define atomic64_fetch_xor_acquire atomic64_fetch_xor -#define atomic64_fetch_xor_release atomic64_fetch_xor - -#else /* atomic64_fetch_xor_relaxed */ - -#ifndef atomic64_fetch_xor_acquire -#define atomic64_fetch_xor_acquire(...) \ - __atomic_op_acquire(atomic64_fetch_xor, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_xor_release -#define atomic64_fetch_xor_release(...) \ - __atomic_op_release(atomic64_fetch_xor, __VA_ARGS__) -#endif - -#ifndef atomic64_fetch_xor -#define atomic64_fetch_xor(...) \ - __atomic_op_fence(atomic64_fetch_xor, __VA_ARGS__) -#endif -#endif /* atomic64_fetch_xor_relaxed */ - - -/* atomic64_xchg_relaxed */ -#ifndef atomic64_xchg_relaxed -#define atomic64_xchg_relaxed atomic64_xchg -#define atomic64_xchg_acquire atomic64_xchg -#define atomic64_xchg_release atomic64_xchg - -#else /* atomic64_xchg_relaxed */ - -#ifndef atomic64_xchg_acquire -#define atomic64_xchg_acquire(...) \ - __atomic_op_acquire(atomic64_xchg, __VA_ARGS__) -#endif - -#ifndef atomic64_xchg_release -#define atomic64_xchg_release(...) \ - __atomic_op_release(atomic64_xchg, __VA_ARGS__) -#endif - -#ifndef atomic64_xchg -#define atomic64_xchg(...) \ - __atomic_op_fence(atomic64_xchg, __VA_ARGS__) -#endif -#endif /* atomic64_xchg_relaxed */ - -/* atomic64_cmpxchg_relaxed */ -#ifndef atomic64_cmpxchg_relaxed -#define atomic64_cmpxchg_relaxed atomic64_cmpxchg -#define atomic64_cmpxchg_acquire atomic64_cmpxchg -#define atomic64_cmpxchg_release atomic64_cmpxchg - -#else /* atomic64_cmpxchg_relaxed */ - -#ifndef atomic64_cmpxchg_acquire -#define atomic64_cmpxchg_acquire(...) \ - __atomic_op_acquire(atomic64_cmpxchg, __VA_ARGS__) -#endif - -#ifndef atomic64_cmpxchg_release -#define atomic64_cmpxchg_release(...) \ - __atomic_op_release(atomic64_cmpxchg, __VA_ARGS__) -#endif - -#ifndef atomic64_cmpxchg -#define atomic64_cmpxchg(...) \ - __atomic_op_fence(atomic64_cmpxchg, __VA_ARGS__) -#endif -#endif /* atomic64_cmpxchg_relaxed */ - -#ifndef atomic64_try_cmpxchg - -#define __atomic64_try_cmpxchg(type, _p, _po, _n) \ -({ \ - typeof(_po) __po = (_po); \ - typeof(*(_po)) __r, __o = *__po; \ - __r = atomic64_cmpxchg##type((_p), __o, (_n)); \ - if (unlikely(__r != __o)) \ - *__po = __r; \ - likely(__r == __o); \ -}) - -#define atomic64_try_cmpxchg(_p, _po, _n) __atomic64_try_cmpxchg(, _p, _po, _n) -#define atomic64_try_cmpxchg_relaxed(_p, _po, _n) __atomic64_try_cmpxchg(_relaxed, _p, _po, _n) -#define atomic64_try_cmpxchg_acquire(_p, _po, _n) __atomic64_try_cmpxchg(_acquire, _p, _po, _n) -#define atomic64_try_cmpxchg_release(_p, _po, _n) __atomic64_try_cmpxchg(_release, _p, _po, _n) - -#else /* atomic64_try_cmpxchg */ -#define atomic64_try_cmpxchg_relaxed atomic64_try_cmpxchg -#define atomic64_try_cmpxchg_acquire atomic64_try_cmpxchg -#define atomic64_try_cmpxchg_release atomic64_try_cmpxchg -#endif /* atomic64_try_cmpxchg */ - -/** - * atomic64_fetch_add_unless - add unless the number is already a given value - * @v: pointer of type atomic64_t - * @a: the amount to add to v... - * @u: ...unless v is equal to u. - * - * Atomically adds @a to @v, if @v was not already @u. - * Returns the original value of @v. - */ -#ifndef atomic64_fetch_add_unless -static inline long long atomic64_fetch_add_unless(atomic64_t *v, long long a, - long long u) -{ - long long c = atomic64_read(v); - - do { - if (unlikely(c == u)) - break; - } while (!atomic64_try_cmpxchg(v, &c, c + a)); - - return c; -} -#endif - -/** - * atomic64_add_unless - add unless the number is already a given value - * @v: pointer of type atomic_t - * @a: the amount to add to v... - * @u: ...unless v is equal to u. - * - * Atomically adds @a to @v, if @v was not already @u. - * Returns true if the addition was done. - */ -static inline bool atomic64_add_unless(atomic64_t *v, long long a, long long u) -{ - return atomic64_fetch_add_unless(v, a, u) != u; -} - -/** - * atomic64_inc_not_zero - increment unless the number is zero - * @v: pointer of type atomic64_t - * - * Atomically increments @v by 1, if @v is non-zero. - * Returns true if the increment was done. - */ -#ifndef atomic64_inc_not_zero -#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0) -#endif - -/** - * atomic64_inc_and_test - increment and test - * @v: pointer of type atomic64_t - * - * Atomically increments @v by 1 - * and returns true if the result is zero, or false for all - * other cases. - */ -#ifndef atomic64_inc_and_test -static inline bool atomic64_inc_and_test(atomic64_t *v) -{ - return atomic64_inc_return(v) == 0; -} -#endif - -/** - * atomic64_dec_and_test - decrement and test - * @v: pointer of type atomic64_t - * - * Atomically decrements @v by 1 and - * returns true if the result is 0, or false for all other - * cases. - */ -#ifndef atomic64_dec_and_test -static inline bool atomic64_dec_and_test(atomic64_t *v) -{ - return atomic64_dec_return(v) == 0; -} -#endif - -/** - * atomic64_sub_and_test - subtract value from variable and test result - * @i: integer value to subtract - * @v: pointer of type atomic64_t - * - * Atomically subtracts @i from @v and returns - * true if the result is zero, or false for all - * other cases. - */ -#ifndef atomic64_sub_and_test -static inline bool atomic64_sub_and_test(long long i, atomic64_t *v) -{ - return atomic64_sub_return(i, v) == 0; -} -#endif - -/** - * atomic64_add_negative - add and test if negative - * @i: integer value to add - * @v: pointer of type atomic64_t - * - * Atomically adds @i to @v and returns true - * if the result is negative, or false when - * result is greater than or equal to zero. - */ -#ifndef atomic64_add_negative -static inline bool atomic64_add_negative(long long i, atomic64_t *v) -{ - return atomic64_add_return(i, v) < 0; -} -#endif - -#ifndef atomic64_inc_unless_negative -static inline bool atomic64_inc_unless_negative(atomic64_t *v) -{ - long long c = atomic64_read(v); - - do { - if (unlikely(c < 0)) - return false; - } while (!atomic64_try_cmpxchg(v, &c, c + 1)); - - return true; -} -#endif - -#ifndef atomic64_dec_unless_positive -static inline bool atomic64_dec_unless_positive(atomic64_t *v) -{ - long long c = atomic64_read(v); - - do { - if (unlikely(c > 0)) - return false; - } while (!atomic64_try_cmpxchg(v, &c, c - 1)); - - return true; -} -#endif - -/* - * atomic64_dec_if_positive - decrement by 1 if old value positive - * @v: pointer of type atomic64_t - * - * The function returns the old value of *v minus 1, even if - * the atomic64 variable, v, was not decremented. - */ -#ifndef atomic64_dec_if_positive -static inline long long atomic64_dec_if_positive(atomic64_t *v) -{ - long long dec, c = atomic64_read(v); - - do { - dec = c - 1; - if (unlikely(dec < 0)) - break; - } while (!atomic64_try_cmpxchg(v, &c, dec)); - - return dec; -} -#endif - -#define atomic64_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c)) -#define atomic64_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c)) +#include <linux/atomic-fallback.h> #include <asm-generic/atomic-long.h> diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index c5335df2372f..79c3873d58ac 100644 --- a/include/linux/lockdep.h +++ b/include/linux/lockdep.h @@ -46,16 +46,22 @@ extern int lock_stat; #define NR_LOCKDEP_CACHING_CLASSES 2 /* - * Lock-classes are keyed via unique addresses, by embedding the - * lockclass-key into the kernel (or module) .data section. (For - * static locks we use the lock address itself as the key.) + * A lockdep key is associated with each lock object. For static locks we use + * the lock address itself as the key. Dynamically allocated lock objects can + * have a statically or dynamically allocated key. Dynamically allocated lock + * keys must be registered before being used and must be unregistered before + * the key memory is freed. */ struct lockdep_subclass_key { char __one_byte; } __attribute__ ((__packed__)); +/* hash_entry is used to keep track of dynamically allocated keys. */ struct lock_class_key { - struct lockdep_subclass_key subkeys[MAX_LOCKDEP_SUBCLASSES]; + union { + struct hlist_node hash_entry; + struct lockdep_subclass_key subkeys[MAX_LOCKDEP_SUBCLASSES]; + }; }; extern struct lock_class_key __lockdep_no_validate__; @@ -63,7 +69,8 @@ extern struct lock_class_key __lockdep_no_validate__; #define LOCKSTAT_POINTS 4 /* - * The lock-class itself: + * The lock-class itself. The order of the structure members matters. + * reinit_class() zeroes the key member and all subsequent members. */ struct lock_class { /* @@ -72,10 +79,19 @@ struct lock_class { struct hlist_node hash_entry; /* - * global list of all lock-classes: + * Entry in all_lock_classes when in use. Entry in free_lock_classes + * when not in use. Instances that are being freed are on one of the + * zapped_classes lists. */ struct list_head lock_entry; + /* + * These fields represent a directed graph of lock dependencies, + * to every node we attach a list of "forward" and a list of + * "backward" graph nodes. + */ + struct list_head locks_after, locks_before; + struct lockdep_subclass_key *key; unsigned int subclass; unsigned int dep_gen_id; @@ -87,13 +103,6 @@ struct lock_class { struct stack_trace usage_traces[XXX_LOCK_USAGE_STATES]; /* - * These fields represent a directed graph of lock dependencies, - * to every node we attach a list of "forward" and a list of - * "backward" graph nodes. - */ - struct list_head locks_after, locks_before; - - /* * Generation counter, when doing certain classes of graph walking, * to ensure that we check one node only once: */ @@ -104,7 +113,7 @@ struct lock_class { unsigned long contention_point[LOCKSTAT_POINTS]; unsigned long contending_point[LOCKSTAT_POINTS]; #endif -}; +} __no_randomize_layout; #ifdef CONFIG_LOCK_STAT struct lock_time { @@ -178,6 +187,7 @@ static inline void lockdep_copy_map(struct lockdep_map *to, struct lock_list { struct list_head entry; struct lock_class *class; + struct lock_class *links_to; struct stack_trace trace; int distance; @@ -264,10 +274,14 @@ extern void lockdep_reset(void); extern void lockdep_reset_lock(struct lockdep_map *lock); extern void lockdep_free_key_range(void *start, unsigned long size); extern asmlinkage void lockdep_sys_exit(void); +extern void lockdep_set_selftest_task(struct task_struct *task); extern void lockdep_off(void); extern void lockdep_on(void); +extern void lockdep_register_key(struct lock_class_key *key); +extern void lockdep_unregister_key(struct lock_class_key *key); + /* * These methods are used by specific locking variants (spinlocks, * rwlocks, mutexes and rwsems) to pass init/acquire/release events @@ -394,6 +408,10 @@ static inline void lockdep_on(void) { } +static inline void lockdep_set_selftest_task(struct task_struct *task) +{ +} + # define lock_acquire(l, s, t, r, c, n, i) do { } while (0) # define lock_release(l, n, i) do { } while (0) # define lock_downgrade(l, i) do { } while (0) @@ -425,6 +443,14 @@ static inline void lockdep_on(void) */ struct lock_class_key { }; +static inline void lockdep_register_key(struct lock_class_key *key) +{ +} + +static inline void lockdep_unregister_key(struct lock_class_key *key) +{ +} + /* * The lockdep_map takes no space if lockdep is disabled: */ diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h index 71b75643c432..03cb4b6f842e 100644 --- a/include/linux/percpu-rwsem.h +++ b/include/linux/percpu-rwsem.h @@ -29,7 +29,7 @@ static struct percpu_rw_semaphore name = { \ extern int __percpu_down_read(struct percpu_rw_semaphore *, int); extern void __percpu_up_read(struct percpu_rw_semaphore *); -static inline void percpu_down_read_preempt_disable(struct percpu_rw_semaphore *sem) +static inline void percpu_down_read(struct percpu_rw_semaphore *sem) { might_sleep(); @@ -47,16 +47,10 @@ static inline void percpu_down_read_preempt_disable(struct percpu_rw_semaphore * __this_cpu_inc(*sem->read_count); if (unlikely(!rcu_sync_is_idle(&sem->rss))) __percpu_down_read(sem, false); /* Unconditional memory barrier */ - barrier(); /* - * The barrier() prevents the compiler from + * The preempt_enable() prevents the compiler from * bleeding the critical section out. */ -} - -static inline void percpu_down_read(struct percpu_rw_semaphore *sem) -{ - percpu_down_read_preempt_disable(sem); preempt_enable(); } @@ -83,13 +77,9 @@ static inline int percpu_down_read_trylock(struct percpu_rw_semaphore *sem) return ret; } -static inline void percpu_up_read_preempt_enable(struct percpu_rw_semaphore *sem) +static inline void percpu_up_read(struct percpu_rw_semaphore *sem) { - /* - * The barrier() prevents the compiler from - * bleeding the critical section out. - */ - barrier(); + preempt_disable(); /* * Same as in percpu_down_read(). */ @@ -102,12 +92,6 @@ static inline void percpu_up_read_preempt_enable(struct percpu_rw_semaphore *sem rwsem_release(&sem->rw_sem.dep_map, 1, _RET_IP_); } -static inline void percpu_up_read(struct percpu_rw_semaphore *sem) -{ - preempt_disable(); - percpu_up_read_preempt_enable(sem); -} - extern void percpu_down_write(struct percpu_rw_semaphore *); extern void percpu_up_write(struct percpu_rw_semaphore *); diff --git a/include/linux/sched/wake_q.h b/include/linux/sched/wake_q.h index 545f37138057..ad826d2a4557 100644 --- a/include/linux/sched/wake_q.h +++ b/include/linux/sched/wake_q.h @@ -51,8 +51,8 @@ static inline void wake_q_init(struct wake_q_head *head) head->lastp = &head->first; } -extern void wake_q_add(struct wake_q_head *head, - struct task_struct *task); +extern void wake_q_add(struct wake_q_head *head, struct task_struct *task); +extern void wake_q_add_safe(struct wake_q_head *head, struct task_struct *task); extern void wake_up_q(struct wake_q_head *head); #endif /* _LINUX_SCHED_WAKE_Q_H */ diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h index 60d673e15632..d9a1a480e920 100644 --- a/include/linux/workqueue.h +++ b/include/linux/workqueue.h @@ -390,43 +390,23 @@ extern struct workqueue_struct *system_freezable_wq; extern struct workqueue_struct *system_power_efficient_wq; extern struct workqueue_struct *system_freezable_power_efficient_wq; -extern struct workqueue_struct * -__alloc_workqueue_key(const char *fmt, unsigned int flags, int max_active, - struct lock_class_key *key, const char *lock_name, ...) __printf(1, 6); - /** * alloc_workqueue - allocate a workqueue * @fmt: printf format for the name of the workqueue * @flags: WQ_* flags * @max_active: max in-flight work items, 0 for default - * @args...: args for @fmt + * remaining args: args for @fmt * * Allocate a workqueue with the specified parameters. For detailed * information on WQ_* flags, please refer to * Documentation/core-api/workqueue.rst. * - * The __lock_name macro dance is to guarantee that single lock_class_key - * doesn't end up with different namesm, which isn't allowed by lockdep. - * * RETURNS: * Pointer to the allocated workqueue on success, %NULL on failure. */ -#ifdef CONFIG_LOCKDEP -#define alloc_workqueue(fmt, flags, max_active, args...) \ -({ \ - static struct lock_class_key __key; \ - const char *__lock_name; \ - \ - __lock_name = "(wq_completion)"#fmt#args; \ - \ - __alloc_workqueue_key((fmt), (flags), (max_active), \ - &__key, __lock_name, ##args); \ -}) -#else -#define alloc_workqueue(fmt, flags, max_active, args...) \ - __alloc_workqueue_key((fmt), (flags), (max_active), \ - NULL, NULL, ##args) -#endif +struct workqueue_struct *alloc_workqueue(const char *fmt, + unsigned int flags, + int max_active, ...); /** * alloc_ordered_workqueue - allocate an ordered workqueue diff --git a/kernel/cpu.c b/kernel/cpu.c index d1c6d152da89..025f419d16f6 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -313,6 +313,15 @@ void cpus_write_unlock(void) void lockdep_assert_cpus_held(void) { + /* + * We can't have hotplug operations before userspace starts running, + * and some init codepaths will knowingly not take the hotplug lock. + * This is all valid, so mute lockdep until it makes sense to report + * unheld locks. + */ + if (system_state < SYSTEM_RUNNING) + return; + percpu_rwsem_assert_held(&cpu_hotplug_lock); } diff --git a/kernel/futex.c b/kernel/futex.c index ca58fc0a496e..c3b73b0311bc 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -68,6 +68,7 @@ #include <linux/freezer.h> #include <linux/memblock.h> #include <linux/fault-inject.h> +#include <linux/refcount.h> #include <asm/futex.h> @@ -212,7 +213,7 @@ struct futex_pi_state { struct rt_mutex pi_mutex; struct task_struct *owner; - atomic_t refcount; + refcount_t refcount; union futex_key key; } __randomize_layout; @@ -321,12 +322,8 @@ static int __init fail_futex_debugfs(void) if (IS_ERR(dir)) return PTR_ERR(dir); - if (!debugfs_create_bool("ignore-private", mode, dir, - &fail_futex.ignore_private)) { - debugfs_remove_recursive(dir); - return -ENOMEM; - } - + debugfs_create_bool("ignore-private", mode, dir, + &fail_futex.ignore_private); return 0; } @@ -803,7 +800,7 @@ static int refill_pi_state_cache(void) INIT_LIST_HEAD(&pi_state->list); /* pi_mutex gets initialized later */ pi_state->owner = NULL; - atomic_set(&pi_state->refcount, 1); + refcount_set(&pi_state->refcount, 1); pi_state->key = FUTEX_KEY_INIT; current->pi_state_cache = pi_state; @@ -823,7 +820,7 @@ static struct futex_pi_state *alloc_pi_state(void) static void get_pi_state(struct futex_pi_state *pi_state) { - WARN_ON_ONCE(!atomic_inc_not_zero(&pi_state->refcount)); + WARN_ON_ONCE(!refcount_inc_not_zero(&pi_state->refcount)); } /* @@ -835,7 +832,7 @@ static void put_pi_state(struct futex_pi_state *pi_state) if (!pi_state) return; - if (!atomic_dec_and_test(&pi_state->refcount)) + if (!refcount_dec_and_test(&pi_state->refcount)) return; /* @@ -865,7 +862,7 @@ static void put_pi_state(struct futex_pi_state *pi_state) * refcount is at 0 - put it back to 1. */ pi_state->owner = NULL; - atomic_set(&pi_state->refcount, 1); + refcount_set(&pi_state->refcount, 1); current->pi_state_cache = pi_state; } } @@ -908,7 +905,7 @@ void exit_pi_state_list(struct task_struct *curr) * In that case; drop the locks to let put_pi_state() make * progress and retry the loop. */ - if (!atomic_inc_not_zero(&pi_state->refcount)) { + if (!refcount_inc_not_zero(&pi_state->refcount)) { raw_spin_unlock_irq(&curr->pi_lock); cpu_relax(); raw_spin_lock_irq(&curr->pi_lock); @@ -1064,7 +1061,7 @@ static int attach_to_pi_state(u32 __user *uaddr, u32 uval, * and futex_wait_requeue_pi() as it cannot go to 0 and consequently * free pi_state before we can take a reference ourselves. */ - WARN_ON(!atomic_read(&pi_state->refcount)); + WARN_ON(!refcount_read(&pi_state->refcount)); /* * Now that we have a pi_state, we can acquire wait_lock @@ -1467,8 +1464,7 @@ static void mark_wake_futex(struct wake_q_head *wake_q, struct futex_q *q) * Queue the task for later wakeup for after we've released * the hb->lock. wake_q_add() grabs reference to p. */ - wake_q_add(wake_q, p); - put_task_struct(p); + wake_q_add_safe(wake_q, p); } /* diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 95932333a48b..fda370ca529c 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -45,11 +45,13 @@ #include <linux/hash.h> #include <linux/ftrace.h> #include <linux/stringify.h> +#include <linux/bitmap.h> #include <linux/bitops.h> #include <linux/gfp.h> #include <linux/random.h> #include <linux/jhash.h> #include <linux/nmi.h> +#include <linux/rcupdate.h> #include <asm/sections.h> @@ -81,6 +83,7 @@ module_param(lock_stat, int, 0644); * code to recurse back into the lockdep code... */ static arch_spinlock_t lockdep_lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED; +static struct task_struct *lockdep_selftest_task_struct; static int graph_lock(void) { @@ -130,13 +133,17 @@ static inline int debug_locks_off_graph_unlock(void) unsigned long nr_list_entries; static struct lock_list list_entries[MAX_LOCKDEP_ENTRIES]; +static DECLARE_BITMAP(list_entries_in_use, MAX_LOCKDEP_ENTRIES); /* * All data structures here are protected by the global debug_lock. * - * Mutex key structs only get allocated, once during bootup, and never - * get freed - this significantly simplifies the debugging code. + * nr_lock_classes is the number of elements of lock_classes[] that is + * in use. */ +#define KEYHASH_BITS (MAX_LOCKDEP_KEYS_BITS - 1) +#define KEYHASH_SIZE (1UL << KEYHASH_BITS) +static struct hlist_head lock_keys_hash[KEYHASH_SIZE]; unsigned long nr_lock_classes; #ifndef CONFIG_DEBUG_LOCKDEP static @@ -277,11 +284,42 @@ static inline void lock_release_holdtime(struct held_lock *hlock) #endif /* - * We keep a global list of all lock classes. The list only grows, - * never shrinks. The list is only accessed with the lockdep - * spinlock lock held. + * We keep a global list of all lock classes. The list is only accessed with + * the lockdep spinlock lock held. free_lock_classes is a list with free + * elements. These elements are linked together by the lock_entry member in + * struct lock_class. */ LIST_HEAD(all_lock_classes); +static LIST_HEAD(free_lock_classes); + +/** + * struct pending_free - information about data structures about to be freed + * @zapped: Head of a list with struct lock_class elements. + * @lock_chains_being_freed: Bitmap that indicates which lock_chains[] elements + * are about to be freed. + */ +struct pending_free { + struct list_head zapped; + DECLARE_BITMAP(lock_chains_being_freed, MAX_LOCKDEP_CHAINS); +}; + +/** + * struct delayed_free - data structures used for delayed freeing + * + * A data structure for delayed freeing of data structures that may be + * accessed by RCU readers at the time these were freed. + * + * @rcu_head: Used to schedule an RCU callback for freeing data structures. + * @index: Index of @pf to which freed data structures are added. + * @scheduled: Whether or not an RCU callback has been scheduled. + * @pf: Array with information about data structures about to be freed. + */ +static struct delayed_free { + struct rcu_head rcu_head; + int index; + int scheduled; + struct pending_free pf[2]; +} delayed_free; /* * The lockdep classes are in a hash-table as well, for fast lookup: @@ -331,6 +369,11 @@ void lockdep_on(void) } EXPORT_SYMBOL(lockdep_on); +void lockdep_set_selftest_task(struct task_struct *task) +{ + lockdep_selftest_task_struct = task; +} + /* * Debugging switches: */ @@ -599,7 +642,7 @@ static int very_verbose(struct lock_class *class) * Is this the address of a static object: */ #ifdef __KERNEL__ -static int static_obj(void *obj) +static int static_obj(const void *obj) { unsigned long start = (unsigned long) &_stext, end = (unsigned long) &_end, @@ -716,6 +759,17 @@ static bool assign_lock_key(struct lockdep_map *lock) { unsigned long can_addr, addr = (unsigned long)lock; +#ifdef __KERNEL__ + /* + * lockdep_free_key_range() assumes that struct lock_class_key + * objects do not overlap. Since we use the address of lock + * objects as class key for static objects, check whether the + * size of lock_class_key objects does not exceed the size of + * the smallest lock object. + */ + BUILD_BUG_ON(sizeof(struct lock_class_key) > sizeof(raw_spinlock_t)); +#endif + if (__is_kernel_percpu_address(addr, &can_addr)) lock->key = (void *)can_addr; else if (__is_module_percpu_address(addr, &can_addr)) @@ -735,6 +789,280 @@ static bool assign_lock_key(struct lockdep_map *lock) return true; } +#ifdef CONFIG_DEBUG_LOCKDEP + +/* Check whether element @e occurs in list @h */ +static bool in_list(struct list_head *e, struct list_head *h) +{ + struct list_head *f; + + list_for_each(f, h) { + if (e == f) + return true; + } + + return false; +} + +/* + * Check whether entry @e occurs in any of the locks_after or locks_before + * lists. + */ +static bool in_any_class_list(struct list_head *e) +{ + struct lock_class *class; + int i; + + for (i = 0; i < ARRAY_SIZE(lock_classes); i++) { + class = &lock_classes[i]; + if (in_list(e, &class->locks_after) || + in_list(e, &class->locks_before)) + return true; + } + return false; +} + +static bool class_lock_list_valid(struct lock_class *c, struct list_head *h) +{ + struct lock_list *e; + + list_for_each_entry(e, h, entry) { + if (e->links_to != c) { + printk(KERN_INFO "class %s: mismatch for lock entry %ld; class %s <> %s", + c->name ? : "(?)", + (unsigned long)(e - list_entries), + e->links_to && e->links_to->name ? + e->links_to->name : "(?)", + e->class && e->class->name ? e->class->name : + "(?)"); + return false; + } + } + return true; +} + +static u16 chain_hlocks[]; + +static bool check_lock_chain_key(struct lock_chain *chain) +{ +#ifdef CONFIG_PROVE_LOCKING + u64 chain_key = 0; + int i; + + for (i = chain->base; i < chain->base + chain->depth; i++) + chain_key = iterate_chain_key(chain_key, chain_hlocks[i] + 1); + /* + * The 'unsigned long long' casts avoid that a compiler warning + * is reported when building tools/lib/lockdep. + */ + if (chain->chain_key != chain_key) { + printk(KERN_INFO "chain %lld: key %#llx <> %#llx\n", + (unsigned long long)(chain - lock_chains), + (unsigned long long)chain->chain_key, + (unsigned long long)chain_key); + return false; + } +#endif + return true; +} + +static bool in_any_zapped_class_list(struct lock_class *class) +{ + struct pending_free *pf; + int i; + + for (i = 0, pf = delayed_free.pf; i < ARRAY_SIZE(delayed_free.pf); i++, pf++) { + if (in_list(&class->lock_entry, &pf->zapped)) + return true; + } + + return false; +} + +static bool __check_data_structures(void) +{ + struct lock_class *class; + struct lock_chain *chain; + struct hlist_head *head; + struct lock_list *e; + int i; + + /* Check whether all classes occur in a lock list. */ + for (i = 0; i < ARRAY_SIZE(lock_classes); i++) { + class = &lock_classes[i]; + if (!in_list(&class->lock_entry, &all_lock_classes) && + !in_list(&class->lock_entry, &free_lock_classes) && + !in_any_zapped_class_list(class)) { + printk(KERN_INFO "class %px/%s is not in any class list\n", + class, class->name ? : "(?)"); + return false; + } + } + + /* Check whether all classes have valid lock lists. */ + for (i = 0; i < ARRAY_SIZE(lock_classes); i++) { + class = &lock_classes[i]; + if (!class_lock_list_valid(class, &class->locks_before)) + return false; + if (!class_lock_list_valid(class, &class->locks_after)) + return false; + } + + /* Check the chain_key of all lock chains. */ + for (i = 0; i < ARRAY_SIZE(chainhash_table); i++) { + head = chainhash_table + i; + hlist_for_each_entry_rcu(chain, head, entry) { + if (!check_lock_chain_key(chain)) + return false; + } + } + + /* + * Check whether all list entries that are in use occur in a class + * lock list. + */ + for_each_set_bit(i, list_entries_in_use, ARRAY_SIZE(list_entries)) { + e = list_entries + i; + if (!in_any_class_list(&e->entry)) { + printk(KERN_INFO "list entry %d is not in any class list; class %s <> %s\n", + (unsigned int)(e - list_entries), + e->class->name ? : "(?)", + e->links_to->name ? : "(?)"); + return false; + } + } + + /* + * Check whether all list entries that are not in use do not occur in + * a class lock list. + */ + for_each_clear_bit(i, list_entries_in_use, ARRAY_SIZE(list_entries)) { + e = list_entries + i; + if (in_any_class_list(&e->entry)) { + printk(KERN_INFO "list entry %d occurs in a class list; class %s <> %s\n", + (unsigned int)(e - list_entries), + e->class && e->class->name ? e->class->name : + "(?)", + e->links_to && e->links_to->name ? + e->links_to->name : "(?)"); + return false; + } + } + + return true; +} + +int check_consistency = 0; +module_param(check_consistency, int, 0644); + +static void check_data_structures(void) +{ + static bool once = false; + + if (check_consistency && !once) { + if (!__check_data_structures()) { + once = true; + WARN_ON(once); + } + } +} + +#else /* CONFIG_DEBUG_LOCKDEP */ + +static inline void check_data_structures(void) { } + +#endif /* CONFIG_DEBUG_LOCKDEP */ + +/* + * Initialize the lock_classes[] array elements, the free_lock_classes list + * and also the delayed_free structure. + */ +static void init_data_structures_once(void) +{ + static bool initialization_happened; + int i; + + if (likely(initialization_happened)) + return; + + initialization_happened = true; + + init_rcu_head(&delayed_free.rcu_head); + INIT_LIST_HEAD(&delayed_free.pf[0].zapped); + INIT_LIST_HEAD(&delayed_free.pf[1].zapped); + + for (i = 0; i < ARRAY_SIZE(lock_classes); i++) { + list_add_tail(&lock_classes[i].lock_entry, &free_lock_classes); + INIT_LIST_HEAD(&lock_classes[i].locks_after); + INIT_LIST_HEAD(&lock_classes[i].locks_before); + } +} + +static inline struct hlist_head *keyhashentry(const struct lock_class_key *key) +{ + unsigned long hash = hash_long((uintptr_t)key, KEYHASH_BITS); + + return lock_keys_hash + hash; +} + +/* Register a dynamically allocated key. */ +void lockdep_register_key(struct lock_class_key *key) +{ + struct hlist_head *hash_head; + struct lock_class_key *k; + unsigned long flags; + + if (WARN_ON_ONCE(static_obj(key))) + return; + hash_head = keyhashentry(key); + + raw_local_irq_save(flags); + if (!graph_lock()) + goto restore_irqs; + hlist_for_each_entry_rcu(k, hash_head, hash_entry) { + if (WARN_ON_ONCE(k == key)) + goto out_unlock; + } + hlist_add_head_rcu(&key->hash_entry, hash_head); +out_unlock: + graph_unlock(); +restore_irqs: + raw_local_irq_restore(flags); +} +EXPORT_SYMBOL_GPL(lockdep_register_key); + +/* Check whether a key has been registered as a dynamic key. */ +static bool is_dynamic_key(const struct lock_class_key *key) +{ + struct hlist_head *hash_head; + struct lock_class_key *k; + bool found = false; + + if (WARN_ON_ONCE(static_obj(key))) + return false; + + /* + * If lock debugging is disabled lock_keys_hash[] may contain + * pointers to memory that has already been freed. Avoid triggering + * a use-after-free in that case by returning early. + */ + if (!debug_locks) + return true; + + hash_head = keyhashentry(key); + + rcu_read_lock(); + hlist_for_each_entry_rcu(k, hash_head, hash_entry) { + if (k == key) { + found = true; + break; + } + } + rcu_read_unlock(); + + return found; +} + /* * Register a lock's class in the hash-table, if the class is not present * yet. Otherwise we look it up. We cache the result in the lock object @@ -756,7 +1084,7 @@ register_lock_class(struct lockdep_map *lock, unsigned int subclass, int force) if (!lock->key) { if (!assign_lock_key(lock)) return NULL; - } else if (!static_obj(lock->key)) { + } else if (!static_obj(lock->key) && !is_dynamic_key(lock->key)) { return NULL; } @@ -775,11 +1103,12 @@ register_lock_class(struct lockdep_map *lock, unsigned int subclass, int force) goto out_unlock_set; } - /* - * Allocate a new key from the static array, and add it to - * the hash: - */ - if (nr_lock_classes >= MAX_LOCKDEP_KEYS) { + init_data_structures_once(); + + /* Allocate a new lock class and add it to the hash. */ + class = list_first_entry_or_null(&free_lock_classes, typeof(*class), + lock_entry); + if (!class) { if (!debug_locks_off_graph_unlock()) { return NULL; } @@ -788,13 +1117,13 @@ register_lock_class(struct lockdep_map *lock, unsigned int subclass, int force) dump_stack(); return NULL; } - class = lock_classes + nr_lock_classes++; + nr_lock_classes++; debug_atomic_inc(nr_unused_locks); class->key = key; class->name = lock->name; class->subclass = subclass; - INIT_LIST_HEAD(&class->locks_before); - INIT_LIST_HEAD(&class->locks_after); + WARN_ON_ONCE(!list_empty(&class->locks_before)); + WARN_ON_ONCE(!list_empty(&class->locks_after)); class->name_version = count_matching_names(class); /* * We use RCU's safe list-add method to make @@ -802,9 +1131,10 @@ register_lock_class(struct lockdep_map *lock, unsigned int subclass, int force) */ hlist_add_head_rcu(&class->hash_entry, hash_head); /* - * Add it to the global list of classes: + * Remove the class from the free list and add it to the global list + * of classes. */ - list_add_tail(&class->lock_entry, &all_lock_classes); + list_move_tail(&class->lock_entry, &all_lock_classes); if (verbose(class)) { graph_unlock(); @@ -845,7 +1175,10 @@ out_set_class_cache: */ static struct lock_list *alloc_list_entry(void) { - if (nr_list_entries >= MAX_LOCKDEP_ENTRIES) { + int idx = find_first_zero_bit(list_entries_in_use, + ARRAY_SIZE(list_entries)); + + if (idx >= ARRAY_SIZE(list_entries)) { if (!debug_locks_off_graph_unlock()) return NULL; @@ -853,13 +1186,16 @@ static struct lock_list *alloc_list_entry(void) dump_stack(); return NULL; } - return list_entries + nr_list_entries++; + nr_list_entries++; + __set_bit(idx, list_entries_in_use); + return list_entries + idx; } /* * Add a new dependency to the head of the list: */ -static int add_lock_to_list(struct lock_class *this, struct list_head *head, +static int add_lock_to_list(struct lock_class *this, + struct lock_class *links_to, struct list_head *head, unsigned long ip, int distance, struct stack_trace *trace) { @@ -873,6 +1209,7 @@ static int add_lock_to_list(struct lock_class *this, struct list_head *head, return 0; entry->class = this; + entry->links_to = links_to; entry->distance = distance; entry->trace = *trace; /* @@ -955,7 +1292,7 @@ static inline void mark_lock_accessed(struct lock_list *lock, unsigned long nr; nr = lock - list_entries; - WARN_ON(nr >= nr_list_entries); /* Out-of-bounds, input fail */ + WARN_ON(nr >= ARRAY_SIZE(list_entries)); /* Out-of-bounds, input fail */ lock->parent = parent; lock->class->dep_gen_id = lockdep_dependency_gen_id; } @@ -965,7 +1302,7 @@ static inline unsigned long lock_accessed(struct lock_list *lock) unsigned long nr; nr = lock - list_entries; - WARN_ON(nr >= nr_list_entries); /* Out-of-bounds, input fail */ + WARN_ON(nr >= ARRAY_SIZE(list_entries)); /* Out-of-bounds, input fail */ return lock->class->dep_gen_id == lockdep_dependency_gen_id; } @@ -1624,29 +1961,18 @@ static const char *state_rnames[] = { static inline const char *state_name(enum lock_usage_bit bit) { - return (bit & 1) ? state_rnames[bit >> 2] : state_names[bit >> 2]; + return (bit & LOCK_USAGE_READ_MASK) ? state_rnames[bit >> 2] : state_names[bit >> 2]; } static int exclusive_bit(int new_bit) { - /* - * USED_IN - * USED_IN_READ - * ENABLED - * ENABLED_READ - * - * bit 0 - write/read - * bit 1 - used_in/enabled - * bit 2+ state - */ - - int state = new_bit & ~3; - int dir = new_bit & 2; + int state = new_bit & LOCK_USAGE_STATE_MASK; + int dir = new_bit & LOCK_USAGE_DIR_MASK; /* * keep state, bit flip the direction and strip read. */ - return state | (dir ^ 2); + return state | (dir ^ LOCK_USAGE_DIR_MASK); } static int check_irq_usage(struct task_struct *curr, struct held_lock *prev, @@ -1842,6 +2168,24 @@ check_prev_add(struct task_struct *curr, struct held_lock *prev, struct lock_list this; int ret; + if (!hlock_class(prev)->key || !hlock_class(next)->key) { + /* + * The warning statements below may trigger a use-after-free + * of the class name. It is better to trigger a use-after free + * and to have the class name most of the time instead of not + * having the class name available. + */ + WARN_ONCE(!debug_locks_silent && !hlock_class(prev)->key, + "Detected use-after-free of lock class %px/%s\n", + hlock_class(prev), + hlock_class(prev)->name); + WARN_ONCE(!debug_locks_silent && !hlock_class(next)->key, + "Detected use-after-free of lock class %px/%s\n", + hlock_class(next), + hlock_class(next)->name); + return 2; + } + /* * Prove that the new <prev> -> <next> dependency would not * create a circular dependency in the graph. (We do this by @@ -1918,14 +2262,14 @@ check_prev_add(struct task_struct *curr, struct held_lock *prev, * Ok, all validations passed, add the new lock * to the previous lock's dependency list: */ - ret = add_lock_to_list(hlock_class(next), + ret = add_lock_to_list(hlock_class(next), hlock_class(prev), &hlock_class(prev)->locks_after, next->acquire_ip, distance, trace); if (!ret) return 0; - ret = add_lock_to_list(hlock_class(prev), + ret = add_lock_to_list(hlock_class(prev), hlock_class(next), &hlock_class(next)->locks_before, next->acquire_ip, distance, trace); if (!ret) @@ -2018,8 +2362,8 @@ out_bug: return 0; } -unsigned long nr_lock_chains; struct lock_chain lock_chains[MAX_LOCKDEP_CHAINS]; +static DECLARE_BITMAP(lock_chains_in_use, MAX_LOCKDEP_CHAINS); int nr_chain_hlocks; static u16 chain_hlocks[MAX_LOCKDEP_CHAIN_HLOCKS]; @@ -2153,6 +2497,33 @@ static int check_no_collision(struct task_struct *curr, } /* + * Given an index that is >= -1, return the index of the next lock chain. + * Return -2 if there is no next lock chain. + */ +long lockdep_next_lockchain(long i) +{ + i = find_next_bit(lock_chains_in_use, ARRAY_SIZE(lock_chains), i + 1); + return i < ARRAY_SIZE(lock_chains) ? i : -2; +} + +unsigned long lock_chain_count(void) +{ + return bitmap_weight(lock_chains_in_use, ARRAY_SIZE(lock_chains)); +} + +/* Must be called with the graph lock held. */ +static struct lock_chain *alloc_lock_chain(void) +{ + int idx = find_first_zero_bit(lock_chains_in_use, + ARRAY_SIZE(lock_chains)); + + if (unlikely(idx >= ARRAY_SIZE(lock_chains))) + return NULL; + __set_bit(idx, lock_chains_in_use); + return lock_chains + idx; +} + +/* * Adds a dependency chain into chain hashtable. And must be called with * graph_lock held. * @@ -2169,19 +2540,15 @@ static inline int add_chain_cache(struct task_struct *curr, int i, j; /* - * Allocate a new chain entry from the static array, and add - * it to the hash: - */ - - /* - * We might need to take the graph lock, ensure we've got IRQs + * The caller must hold the graph lock, ensure we've got IRQs * disabled to make this an IRQ-safe lock.. for recursion reasons * lockdep won't complain about its own locking errors. */ if (DEBUG_LOCKS_WARN_ON(!irqs_disabled())) return 0; - if (unlikely(nr_lock_chains >= MAX_LOCKDEP_CHAINS)) { + chain = alloc_lock_chain(); + if (!chain) { if (!debug_locks_off_graph_unlock()) return 0; @@ -2189,7 +2556,6 @@ static inline int add_chain_cache(struct task_struct *curr, dump_stack(); return 0; } - chain = lock_chains + nr_lock_chains++; chain->chain_key = chain_key; chain->irq_context = hlock->irq_context; i = get_first_held_lock(curr, hlock); @@ -2206,16 +2572,8 @@ static inline int add_chain_cache(struct task_struct *curr, chain_hlocks[chain->base + j] = lock_id; } chain_hlocks[chain->base + j] = class - lock_classes; - } - - if (nr_chain_hlocks < MAX_LOCKDEP_CHAIN_HLOCKS) nr_chain_hlocks += chain->depth; - -#ifdef CONFIG_DEBUG_LOCKDEP - /* - * Important for check_no_collision(). - */ - if (unlikely(nr_chain_hlocks > MAX_LOCKDEP_CHAIN_HLOCKS)) { + } else { if (!debug_locks_off_graph_unlock()) return 0; @@ -2223,7 +2581,6 @@ static inline int add_chain_cache(struct task_struct *curr, dump_stack(); return 0; } -#endif hlist_add_head_rcu(&chain->entry, hash_head); debug_atomic_inc(chain_lookup_misses); @@ -2233,19 +2590,16 @@ static inline int add_chain_cache(struct task_struct *curr, } /* - * Look up a dependency chain. + * Look up a dependency chain. Must be called with either the graph lock or + * the RCU read lock held. */ static inline struct lock_chain *lookup_chain_cache(u64 chain_key) { struct hlist_head *hash_head = chainhashentry(chain_key); struct lock_chain *chain; - /* - * We can walk it lock-free, because entries only get added - * to the hash: - */ hlist_for_each_entry_rcu(chain, hash_head, entry) { - if (chain->chain_key == chain_key) { + if (READ_ONCE(chain->chain_key) == chain_key) { debug_atomic_inc(chain_lookup_hits); return chain; } @@ -2662,8 +3016,8 @@ mark_lock_irq(struct task_struct *curr, struct held_lock *this, enum lock_usage_bit new_bit) { int excl_bit = exclusive_bit(new_bit); - int read = new_bit & 1; - int dir = new_bit & 2; + int read = new_bit & LOCK_USAGE_READ_MASK; + int dir = new_bit & LOCK_USAGE_DIR_MASK; /* * mark USED_IN has to look forwards -- to ensure no dependency @@ -2687,19 +3041,19 @@ mark_lock_irq(struct task_struct *curr, struct held_lock *this, * states. */ if ((!read || !dir || STRICT_READ_CHECKS) && - !usage(curr, this, excl_bit, state_name(new_bit & ~1))) + !usage(curr, this, excl_bit, state_name(new_bit & ~LOCK_USAGE_READ_MASK))) return 0; /* * Check for read in write conflicts */ if (!read) { - if (!valid_state(curr, this, new_bit, excl_bit + 1)) + if (!valid_state(curr, this, new_bit, excl_bit + LOCK_USAGE_READ_MASK)) return 0; if (STRICT_READ_CHECKS && - !usage(curr, this, excl_bit + 1, - state_name(new_bit + 1))) + !usage(curr, this, excl_bit + LOCK_USAGE_READ_MASK, + state_name(new_bit + LOCK_USAGE_READ_MASK))) return 0; } @@ -2709,35 +3063,28 @@ mark_lock_irq(struct task_struct *curr, struct held_lock *this, return 1; } -enum mark_type { -#define LOCKDEP_STATE(__STATE) __STATE, -#include "lockdep_states.h" -#undef LOCKDEP_STATE -}; - /* * Mark all held locks with a usage bit: */ static int -mark_held_locks(struct task_struct *curr, enum mark_type mark) +mark_held_locks(struct task_struct *curr, enum lock_usage_bit base_bit) { - enum lock_usage_bit usage_bit; struct held_lock *hlock; int i; for (i = 0; i < curr->lockdep_depth; i++) { + enum lock_usage_bit hlock_bit = base_bit; hlock = curr->held_locks + i; - usage_bit = 2 + (mark << 2); /* ENABLED */ if (hlock->read) - usage_bit += 1; /* READ */ + hlock_bit += LOCK_USAGE_READ_MASK; - BUG_ON(usage_bit >= LOCK_USAGE_STATES); + BUG_ON(hlock_bit >= LOCK_USAGE_STATES); if (!hlock->check) continue; - if (!mark_lock(curr, hlock, usage_bit)) + if (!mark_lock(curr, hlock, hlock_bit)) return 0; } @@ -2758,7 +3105,7 @@ static void __trace_hardirqs_on_caller(unsigned long ip) * We are going to turn hardirqs on, so set the * usage bit for all held locks: */ - if (!mark_held_locks(curr, HARDIRQ)) + if (!mark_held_locks(curr, LOCK_ENABLED_HARDIRQ)) return; /* * If we have softirqs enabled, then set the usage @@ -2766,7 +3113,7 @@ static void __trace_hardirqs_on_caller(unsigned long ip) * this bit from being set before) */ if (curr->softirqs_enabled) - if (!mark_held_locks(curr, SOFTIRQ)) + if (!mark_held_locks(curr, LOCK_ENABLED_SOFTIRQ)) return; curr->hardirq_enable_ip = ip; @@ -2880,7 +3227,7 @@ void trace_softirqs_on(unsigned long ip) * enabled too: */ if (curr->hardirqs_enabled) - mark_held_locks(curr, SOFTIRQ); + mark_held_locks(curr, LOCK_ENABLED_SOFTIRQ); current->lockdep_recursion = 0; } @@ -3119,13 +3466,12 @@ void lockdep_init_map(struct lockdep_map *lock, const char *name, if (DEBUG_LOCKS_WARN_ON(!key)) return; /* - * Sanity check, the lock-class key must be persistent: + * Sanity check, the lock-class key must either have been allocated + * statically or must have been registered as a dynamic key. */ - if (!static_obj(key)) { - printk("BUG: key %px not in .data!\n", key); - /* - * What it says above ^^^^^, I suggest you read it. - */ + if (!static_obj(key) && !is_dynamic_key(key)) { + if (debug_locks) + printk(KERN_ERR "BUG: key %px has not been registered!\n", key); DEBUG_LOCKS_WARN_ON(1); return; } @@ -3335,6 +3681,11 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass, if (nest_lock && !__lock_is_held(nest_lock, -1)) return print_lock_nested_lock_not_held(curr, hlock, ip); + if (!debug_locks_silent) { + WARN_ON_ONCE(depth && !hlock_class(hlock - 1)->key); + WARN_ON_ONCE(!hlock_class(hlock)->key); + } + if (!validate_chain(curr, lock, hlock, chain_head, chain_key)) return 0; @@ -3497,6 +3848,9 @@ __lock_set_class(struct lockdep_map *lock, const char *name, unsigned int depth; int i; + if (unlikely(!debug_locks)) + return 0; + depth = curr->lockdep_depth; /* * This function is about (re)setting the class of a held lock, @@ -3535,6 +3889,9 @@ static int __lock_downgrade(struct lockdep_map *lock, unsigned long ip) unsigned int depth; int i; + if (unlikely(!debug_locks)) + return 0; + depth = curr->lockdep_depth; /* * This function is about (re)setting the class of a held lock, @@ -4123,29 +4480,131 @@ void lockdep_reset(void) raw_local_irq_restore(flags); } +/* Remove a class from a lock chain. Must be called with the graph lock held. */ +static void remove_class_from_lock_chain(struct pending_free *pf, + struct lock_chain *chain, + struct lock_class *class) +{ +#ifdef CONFIG_PROVE_LOCKING + struct lock_chain *new_chain; + u64 chain_key; + int i; + + for (i = chain->base; i < chain->base + chain->depth; i++) { + if (chain_hlocks[i] != class - lock_classes) + continue; + /* The code below leaks one chain_hlock[] entry. */ + if (--chain->depth > 0) { + memmove(&chain_hlocks[i], &chain_hlocks[i + 1], + (chain->base + chain->depth - i) * + sizeof(chain_hlocks[0])); + } + /* + * Each lock class occurs at most once in a lock chain so once + * we found a match we can break out of this loop. + */ + goto recalc; + } + /* Since the chain has not been modified, return. */ + return; + +recalc: + chain_key = 0; + for (i = chain->base; i < chain->base + chain->depth; i++) + chain_key = iterate_chain_key(chain_key, chain_hlocks[i] + 1); + if (chain->depth && chain->chain_key == chain_key) + return; + /* Overwrite the chain key for concurrent RCU readers. */ + WRITE_ONCE(chain->chain_key, chain_key); + /* + * Note: calling hlist_del_rcu() from inside a + * hlist_for_each_entry_rcu() loop is safe. + */ + hlist_del_rcu(&chain->entry); + __set_bit(chain - lock_chains, pf->lock_chains_being_freed); + if (chain->depth == 0) + return; + /* + * If the modified lock chain matches an existing lock chain, drop + * the modified lock chain. + */ + if (lookup_chain_cache(chain_key)) + return; + new_chain = alloc_lock_chain(); + if (WARN_ON_ONCE(!new_chain)) { + debug_locks_off(); + return; + } + *new_chain = *chain; + hlist_add_head_rcu(&new_chain->entry, chainhashentry(chain_key)); +#endif +} + +/* Must be called with the graph lock held. */ +static void remove_class_from_lock_chains(struct pending_free *pf, + struct lock_class *class) +{ + struct lock_chain *chain; + struct hlist_head *head; + int i; + + for (i = 0; i < ARRAY_SIZE(chainhash_table); i++) { + head = chainhash_table + i; + hlist_for_each_entry_rcu(chain, head, entry) { + remove_class_from_lock_chain(pf, chain, class); + } + } +} + /* * Remove all references to a lock class. The caller must hold the graph lock. */ -static void zap_class(struct lock_class *class) +static void zap_class(struct pending_free *pf, struct lock_class *class) { + struct lock_list *entry; int i; + WARN_ON_ONCE(!class->key); + /* * Remove all dependencies this lock is * involved in: */ - for (i = 0; i < nr_list_entries; i++) { - if (list_entries[i].class == class) - list_del_rcu(&list_entries[i].entry); + for_each_set_bit(i, list_entries_in_use, ARRAY_SIZE(list_entries)) { + entry = list_entries + i; + if (entry->class != class && entry->links_to != class) + continue; + __clear_bit(i, list_entries_in_use); + nr_list_entries--; + list_del_rcu(&entry->entry); + } + if (list_empty(&class->locks_after) && + list_empty(&class->locks_before)) { + list_move_tail(&class->lock_entry, &pf->zapped); + hlist_del_rcu(&class->hash_entry); + WRITE_ONCE(class->key, NULL); + WRITE_ONCE(class->name, NULL); + nr_lock_classes--; + } else { + WARN_ONCE(true, "%s() failed for class %s\n", __func__, + class->name); } - /* - * Unhash the class and remove it from the all_lock_classes list: - */ - hlist_del_rcu(&class->hash_entry); - list_del(&class->lock_entry); - RCU_INIT_POINTER(class->key, NULL); - RCU_INIT_POINTER(class->name, NULL); + remove_class_from_lock_chains(pf, class); +} + +static void reinit_class(struct lock_class *class) +{ + void *const p = class; + const unsigned int offset = offsetof(struct lock_class, key); + + WARN_ON_ONCE(!class->lock_entry.next); + WARN_ON_ONCE(!list_empty(&class->locks_after)); + WARN_ON_ONCE(!list_empty(&class->locks_before)); + memset(p + offset, 0, sizeof(*class) - offset); + WARN_ON_ONCE(!class->lock_entry.next); + WARN_ON_ONCE(!list_empty(&class->locks_after)); + WARN_ON_ONCE(!list_empty(&class->locks_before)); } static inline int within(const void *addr, void *start, unsigned long size) @@ -4153,55 +4612,175 @@ static inline int within(const void *addr, void *start, unsigned long size) return addr >= start && addr < start + size; } +static bool inside_selftest(void) +{ + return current == lockdep_selftest_task_struct; +} + +/* The caller must hold the graph lock. */ +static struct pending_free *get_pending_free(void) +{ + return delayed_free.pf + delayed_free.index; +} + +static void free_zapped_rcu(struct rcu_head *cb); + /* - * Used in module.c to remove lock classes from memory that is going to be - * freed; and possibly re-used by other modules. - * - * We will have had one sync_sched() before getting here, so we're guaranteed - * nobody will look up these exact classes -- they're properly dead but still - * allocated. + * Schedule an RCU callback if no RCU callback is pending. Must be called with + * the graph lock held. */ -void lockdep_free_key_range(void *start, unsigned long size) +static void call_rcu_zapped(struct pending_free *pf) +{ + WARN_ON_ONCE(inside_selftest()); + + if (list_empty(&pf->zapped)) + return; + + if (delayed_free.scheduled) + return; + + delayed_free.scheduled = true; + + WARN_ON_ONCE(delayed_free.pf + delayed_free.index != pf); + delayed_free.index ^= 1; + + call_rcu(&delayed_free.rcu_head, free_zapped_rcu); +} + +/* The caller must hold the graph lock. May be called from RCU context. */ +static void __free_zapped_classes(struct pending_free *pf) { struct lock_class *class; - struct hlist_head *head; + + check_data_structures(); + + list_for_each_entry(class, &pf->zapped, lock_entry) + reinit_class(class); + + list_splice_init(&pf->zapped, &free_lock_classes); + +#ifdef CONFIG_PROVE_LOCKING + bitmap_andnot(lock_chains_in_use, lock_chains_in_use, + pf->lock_chains_being_freed, ARRAY_SIZE(lock_chains)); + bitmap_clear(pf->lock_chains_being_freed, 0, ARRAY_SIZE(lock_chains)); +#endif +} + +static void free_zapped_rcu(struct rcu_head *ch) +{ + struct pending_free *pf; unsigned long flags; - int i; - int locked; + + if (WARN_ON_ONCE(ch != &delayed_free.rcu_head)) + return; raw_local_irq_save(flags); - locked = graph_lock(); + if (!graph_lock()) + goto out_irq; + + /* closed head */ + pf = delayed_free.pf + (delayed_free.index ^ 1); + __free_zapped_classes(pf); + delayed_free.scheduled = false; /* - * Unhash all classes that were created by this module: + * If there's anything on the open list, close and start a new callback. */ + call_rcu_zapped(delayed_free.pf + delayed_free.index); + + graph_unlock(); +out_irq: + raw_local_irq_restore(flags); +} + +/* + * Remove all lock classes from the class hash table and from the + * all_lock_classes list whose key or name is in the address range [start, + * start + size). Move these lock classes to the zapped_classes list. Must + * be called with the graph lock held. + */ +static void __lockdep_free_key_range(struct pending_free *pf, void *start, + unsigned long size) +{ + struct lock_class *class; + struct hlist_head *head; + int i; + + /* Unhash all classes that were created by a module. */ for (i = 0; i < CLASSHASH_SIZE; i++) { head = classhash_table + i; hlist_for_each_entry_rcu(class, head, hash_entry) { - if (within(class->key, start, size)) - zap_class(class); - else if (within(class->name, start, size)) - zap_class(class); + if (!within(class->key, start, size) && + !within(class->name, start, size)) + continue; + zap_class(pf, class); } } +} - if (locked) - graph_unlock(); +/* + * Used in module.c to remove lock classes from memory that is going to be + * freed; and possibly re-used by other modules. + * + * We will have had one synchronize_rcu() before getting here, so we're + * guaranteed nobody will look up these exact classes -- they're properly dead + * but still allocated. + */ +static void lockdep_free_key_range_reg(void *start, unsigned long size) +{ + struct pending_free *pf; + unsigned long flags; + int locked; + + init_data_structures_once(); + + raw_local_irq_save(flags); + locked = graph_lock(); + if (!locked) + goto out_irq; + + pf = get_pending_free(); + __lockdep_free_key_range(pf, start, size); + call_rcu_zapped(pf); + + graph_unlock(); +out_irq: raw_local_irq_restore(flags); /* * Wait for any possible iterators from look_up_lock_class() to pass * before continuing to free the memory they refer to. - * - * sync_sched() is sufficient because the read-side is IRQ disable. */ synchronize_rcu(); +} - /* - * XXX at this point we could return the resources to the pool; - * instead we leak them. We would need to change to bitmap allocators - * instead of the linear allocators we have now. - */ +/* + * Free all lockdep keys in the range [start, start+size). Does not sleep. + * Ignores debug_locks. Must only be used by the lockdep selftests. + */ +static void lockdep_free_key_range_imm(void *start, unsigned long size) +{ + struct pending_free *pf = delayed_free.pf; + unsigned long flags; + + init_data_structures_once(); + + raw_local_irq_save(flags); + arch_spin_lock(&lockdep_lock); + __lockdep_free_key_range(pf, start, size); + __free_zapped_classes(pf); + arch_spin_unlock(&lockdep_lock); + raw_local_irq_restore(flags); +} + +void lockdep_free_key_range(void *start, unsigned long size) +{ + init_data_structures_once(); + + if (inside_selftest()) + lockdep_free_key_range_imm(start, size); + else + lockdep_free_key_range_reg(start, size); } /* @@ -4226,14 +4805,12 @@ static bool lock_class_cache_is_registered(struct lockdep_map *lock) return false; } -void lockdep_reset_lock(struct lockdep_map *lock) +/* The caller must hold the graph lock. Does not sleep. */ +static void __lockdep_reset_lock(struct pending_free *pf, + struct lockdep_map *lock) { struct lock_class *class; - unsigned long flags; - int j, locked; - - raw_local_irq_save(flags); - locked = graph_lock(); + int j; /* * Remove all classes this lock might have: @@ -4244,27 +4821,104 @@ void lockdep_reset_lock(struct lockdep_map *lock) */ class = look_up_lock_class(lock, j); if (class) - zap_class(class); + zap_class(pf, class); } /* * Debug check: in the end all mapped classes should * be gone. */ - if (unlikely(lock_class_cache_is_registered(lock))) { - if (debug_locks_off_graph_unlock()) { - /* - * We all just reset everything, how did it match? - */ - WARN_ON(1); + if (WARN_ON_ONCE(lock_class_cache_is_registered(lock))) + debug_locks_off(); +} + +/* + * Remove all information lockdep has about a lock if debug_locks == 1. Free + * released data structures from RCU context. + */ +static void lockdep_reset_lock_reg(struct lockdep_map *lock) +{ + struct pending_free *pf; + unsigned long flags; + int locked; + + raw_local_irq_save(flags); + locked = graph_lock(); + if (!locked) + goto out_irq; + + pf = get_pending_free(); + __lockdep_reset_lock(pf, lock); + call_rcu_zapped(pf); + + graph_unlock(); +out_irq: + raw_local_irq_restore(flags); +} + +/* + * Reset a lock. Does not sleep. Ignores debug_locks. Must only be used by the + * lockdep selftests. + */ +static void lockdep_reset_lock_imm(struct lockdep_map *lock) +{ + struct pending_free *pf = delayed_free.pf; + unsigned long flags; + + raw_local_irq_save(flags); + arch_spin_lock(&lockdep_lock); + __lockdep_reset_lock(pf, lock); + __free_zapped_classes(pf); + arch_spin_unlock(&lockdep_lock); + raw_local_irq_restore(flags); +} + +void lockdep_reset_lock(struct lockdep_map *lock) +{ + init_data_structures_once(); + + if (inside_selftest()) + lockdep_reset_lock_imm(lock); + else + lockdep_reset_lock_reg(lock); +} + +/* Unregister a dynamically allocated key. */ +void lockdep_unregister_key(struct lock_class_key *key) +{ + struct hlist_head *hash_head = keyhashentry(key); + struct lock_class_key *k; + struct pending_free *pf; + unsigned long flags; + bool found = false; + + might_sleep(); + + if (WARN_ON_ONCE(static_obj(key))) + return; + + raw_local_irq_save(flags); + if (!graph_lock()) + goto out_irq; + + pf = get_pending_free(); + hlist_for_each_entry_rcu(k, hash_head, hash_entry) { + if (k == key) { + hlist_del_rcu(&k->hash_entry); + found = true; + break; } - goto out_restore; } - if (locked) - graph_unlock(); - -out_restore: + WARN_ON_ONCE(!found); + __lockdep_free_key_range(pf, key, 1); + call_rcu_zapped(pf); + graph_unlock(); +out_irq: raw_local_irq_restore(flags); + + /* Wait until is_dynamic_key() has finished accessing k->hash_entry. */ + synchronize_rcu(); } +EXPORT_SYMBOL_GPL(lockdep_unregister_key); void __init lockdep_init(void) { @@ -4278,20 +4932,24 @@ void __init lockdep_init(void) printk("... MAX_LOCKDEP_CHAINS: %lu\n", MAX_LOCKDEP_CHAINS); printk("... CHAINHASH_SIZE: %lu\n", CHAINHASH_SIZE); - printk(" memory used by lock dependency info: %lu kB\n", - (sizeof(struct lock_class) * MAX_LOCKDEP_KEYS + - sizeof(struct list_head) * CLASSHASH_SIZE + - sizeof(struct lock_list) * MAX_LOCKDEP_ENTRIES + - sizeof(struct lock_chain) * MAX_LOCKDEP_CHAINS + - sizeof(struct list_head) * CHAINHASH_SIZE + printk(" memory used by lock dependency info: %zu kB\n", + (sizeof(lock_classes) + + sizeof(classhash_table) + + sizeof(list_entries) + + sizeof(list_entries_in_use) + + sizeof(chainhash_table) + + sizeof(delayed_free) #ifdef CONFIG_PROVE_LOCKING - + sizeof(struct circular_queue) + + sizeof(lock_cq) + + sizeof(lock_chains) + + sizeof(lock_chains_in_use) + + sizeof(chain_hlocks) #endif ) / 1024 ); - printk(" per task-struct memory footprint: %lu bytes\n", - sizeof(struct held_lock) * MAX_LOCK_DEPTH); + printk(" per task-struct memory footprint: %zu bytes\n", + sizeof(((struct task_struct *)NULL)->held_locks)); } static void diff --git a/kernel/locking/lockdep_internals.h b/kernel/locking/lockdep_internals.h index 88c847a41c8a..d4c197425f68 100644 --- a/kernel/locking/lockdep_internals.h +++ b/kernel/locking/lockdep_internals.h @@ -22,6 +22,10 @@ enum lock_usage_bit { LOCK_USAGE_STATES }; +#define LOCK_USAGE_READ_MASK 1 +#define LOCK_USAGE_DIR_MASK 2 +#define LOCK_USAGE_STATE_MASK (~(LOCK_USAGE_READ_MASK | LOCK_USAGE_DIR_MASK)) + /* * Usage-state bitmasks: */ @@ -96,7 +100,8 @@ struct lock_class *lock_chain_get_class(struct lock_chain *chain, int i); extern unsigned long nr_lock_classes; extern unsigned long nr_list_entries; -extern unsigned long nr_lock_chains; +long lockdep_next_lockchain(long i); +unsigned long lock_chain_count(void); extern int nr_chain_hlocks; extern unsigned long nr_stack_trace_entries; diff --git a/kernel/locking/lockdep_proc.c b/kernel/locking/lockdep_proc.c index 3d31f9b0059e..9c49ec645d8b 100644 --- a/kernel/locking/lockdep_proc.c +++ b/kernel/locking/lockdep_proc.c @@ -104,18 +104,18 @@ static const struct seq_operations lockdep_ops = { #ifdef CONFIG_PROVE_LOCKING static void *lc_start(struct seq_file *m, loff_t *pos) { + if (*pos < 0) + return NULL; + if (*pos == 0) return SEQ_START_TOKEN; - if (*pos - 1 < nr_lock_chains) - return lock_chains + (*pos - 1); - - return NULL; + return lock_chains + (*pos - 1); } static void *lc_next(struct seq_file *m, void *v, loff_t *pos) { - (*pos)++; + *pos = lockdep_next_lockchain(*pos - 1) + 1; return lc_start(m, pos); } @@ -268,7 +268,7 @@ static int lockdep_stats_show(struct seq_file *m, void *v) #ifdef CONFIG_PROVE_LOCKING seq_printf(m, " dependency chains: %11lu [max: %lu]\n", - nr_lock_chains, MAX_LOCKDEP_CHAINS); + lock_chain_count(), MAX_LOCKDEP_CHAINS); seq_printf(m, " dependency chain hlocks: %11d [max: %lu]\n", nr_chain_hlocks, MAX_LOCKDEP_CHAIN_HLOCKS); #endif diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index 8a8c3c208c5e..5e9247dc2515 100644 --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -124,9 +124,6 @@ static inline __pure u32 encode_tail(int cpu, int idx) { u32 tail; -#ifdef CONFIG_DEBUG_SPINLOCK - BUG_ON(idx > 3); -#endif tail = (cpu + 1) << _Q_TAIL_CPU_OFFSET; tail |= idx << _Q_TAIL_IDX_OFFSET; /* assume < 4 */ @@ -412,12 +409,28 @@ pv_queue: idx = node->count++; tail = encode_tail(smp_processor_id(), idx); + /* + * 4 nodes are allocated based on the assumption that there will + * not be nested NMIs taking spinlocks. That may not be true in + * some architectures even though the chance of needing more than + * 4 nodes will still be extremely unlikely. When that happens, + * we fall back to spinning on the lock directly without using + * any MCS node. This is not the most elegant solution, but is + * simple enough. + */ + if (unlikely(idx >= MAX_NODES)) { + qstat_inc(qstat_lock_no_node, true); + while (!queued_spin_trylock(lock)) + cpu_relax(); + goto release; + } + node = grab_mcs_node(node, idx); /* * Keep counts of non-zero index values: */ - qstat_inc(qstat_lock_idx1 + idx - 1, idx); + qstat_inc(qstat_lock_use_node2 + idx - 1, idx); /* * Ensure that we increment the head node->count before initialising diff --git a/kernel/locking/qspinlock_stat.h b/kernel/locking/qspinlock_stat.h index 42d3d8dc8f49..d73f85388d5c 100644 --- a/kernel/locking/qspinlock_stat.h +++ b/kernel/locking/qspinlock_stat.h @@ -30,6 +30,13 @@ * pv_wait_node - # of vCPU wait's at a non-head queue node * lock_pending - # of locking operations via pending code * lock_slowpath - # of locking operations via MCS lock queue + * lock_use_node2 - # of locking operations that use 2nd per-CPU node + * lock_use_node3 - # of locking operations that use 3rd per-CPU node + * lock_use_node4 - # of locking operations that use 4th per-CPU node + * lock_no_node - # of locking operations without using per-CPU node + * + * Subtracting lock_use_node[234] from lock_slowpath will give you + * lock_use_node1. * * Writing to the "reset_counters" file will reset all the above counter * values. @@ -55,9 +62,10 @@ enum qlock_stats { qstat_pv_wait_node, qstat_lock_pending, qstat_lock_slowpath, - qstat_lock_idx1, - qstat_lock_idx2, - qstat_lock_idx3, + qstat_lock_use_node2, + qstat_lock_use_node3, + qstat_lock_use_node4, + qstat_lock_no_node, qstat_num, /* Total number of statistical counters */ qstat_reset_cnts = qstat_num, }; @@ -85,9 +93,10 @@ static const char * const qstat_names[qstat_num + 1] = { [qstat_pv_wait_node] = "pv_wait_node", [qstat_lock_pending] = "lock_pending", [qstat_lock_slowpath] = "lock_slowpath", - [qstat_lock_idx1] = "lock_index1", - [qstat_lock_idx2] = "lock_index2", - [qstat_lock_idx3] = "lock_index3", + [qstat_lock_use_node2] = "lock_use_node2", + [qstat_lock_use_node3] = "lock_use_node3", + [qstat_lock_use_node4] = "lock_use_node4", + [qstat_lock_no_node] = "lock_no_node", [qstat_reset_cnts] = "reset_counters", }; diff --git a/kernel/locking/rwsem-xadd.c b/kernel/locking/rwsem-xadd.c index 50d9af615dc4..fbe96341beee 100644 --- a/kernel/locking/rwsem-xadd.c +++ b/kernel/locking/rwsem-xadd.c @@ -211,9 +211,7 @@ static void __rwsem_mark_wake(struct rw_semaphore *sem, * Ensure issuing the wakeup (either by us or someone else) * after setting the reader waiter to nil. */ - wake_q_add(wake_q, tsk); - /* wake_q_add() already take the task ref */ - put_task_struct(tsk); + wake_q_add_safe(wake_q, tsk); } adjustment = woken * RWSEM_ACTIVE_READ_BIAS - adjustment; diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 43f44539b88f..0002995570db 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -396,19 +396,7 @@ static bool set_nr_if_polling(struct task_struct *p) #endif #endif -/** - * wake_q_add() - queue a wakeup for 'later' waking. - * @head: the wake_q_head to add @task to - * @task: the task to queue for 'later' wakeup - * - * Queue a task for later wakeup, most likely by the wake_up_q() call in the - * same context, _HOWEVER_ this is not guaranteed, the wakeup can come - * instantly. - * - * This function must be used as-if it were wake_up_process(); IOW the task - * must be ready to be woken at this location. - */ -void wake_q_add(struct wake_q_head *head, struct task_struct *task) +static bool __wake_q_add(struct wake_q_head *head, struct task_struct *task) { struct wake_q_node *node = &task->wake_q; @@ -421,16 +409,56 @@ void wake_q_add(struct wake_q_head *head, struct task_struct *task) * state, even in the failed case, an explicit smp_mb() must be used. */ smp_mb__before_atomic(); - if (cmpxchg_relaxed(&node->next, NULL, WAKE_Q_TAIL)) - return; - - get_task_struct(task); + if (unlikely(cmpxchg_relaxed(&node->next, NULL, WAKE_Q_TAIL))) + return false; /* * The head is context local, there can be no concurrency. */ *head->lastp = node; head->lastp = &node->next; + return true; +} + +/** + * wake_q_add() - queue a wakeup for 'later' waking. + * @head: the wake_q_head to add @task to + * @task: the task to queue for 'later' wakeup + * + * Queue a task for later wakeup, most likely by the wake_up_q() call in the + * same context, _HOWEVER_ this is not guaranteed, the wakeup can come + * instantly. + * + * This function must be used as-if it were wake_up_process(); IOW the task + * must be ready to be woken at this location. + */ +void wake_q_add(struct wake_q_head *head, struct task_struct *task) +{ + if (__wake_q_add(head, task)) + get_task_struct(task); +} + +/** + * wake_q_add_safe() - safely queue a wakeup for 'later' waking. + * @head: the wake_q_head to add @task to + * @task: the task to queue for 'later' wakeup + * + * Queue a task for later wakeup, most likely by the wake_up_q() call in the + * same context, _HOWEVER_ this is not guaranteed, the wakeup can come + * instantly. + * + * This function must be used as-if it were wake_up_process(); IOW the task + * must be ready to be woken at this location. + * + * This function is essentially a task-safe equivalent to wake_q_add(). Callers + * that already hold reference to @task can call the 'safe' version and trust + * wake_q to do the right thing depending whether or not the @task is already + * queued for wakeup. + */ +void wake_q_add_safe(struct wake_q_head *head, struct task_struct *task) +{ + if (!__wake_q_add(head, task)) + put_task_struct(task); } void wake_up_q(struct wake_q_head *head) @@ -5866,14 +5894,11 @@ void __init sched_init_smp(void) /* * There's no userspace yet to cause hotplug operations; hence all the * CPU masks are stable and all blatant races in the below code cannot - * happen. The hotplug lock is nevertheless taken to satisfy lockdep, - * but there won't be any contention on it. + * happen. */ - cpus_read_lock(); mutex_lock(&sched_domains_mutex); sched_init_domains(cpu_active_mask); mutex_unlock(&sched_domains_mutex); - cpus_read_unlock(); /* Move init over to a non-isolated CPU */ if (set_cpus_allowed_ptr(current, housekeeping_cpumask(HK_FLAG_DOMAIN)) < 0) diff --git a/kernel/workqueue.c b/kernel/workqueue.c index fc5d23d752a5..e163e7a7f5e5 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -259,6 +259,8 @@ struct workqueue_struct { struct wq_device *wq_dev; /* I: for sysfs interface */ #endif #ifdef CONFIG_LOCKDEP + char *lock_name; + struct lock_class_key key; struct lockdep_map lockdep_map; #endif char name[WQ_NAME_LEN]; /* I: workqueue name */ @@ -3337,11 +3339,49 @@ static int init_worker_pool(struct worker_pool *pool) return 0; } +#ifdef CONFIG_LOCKDEP +static void wq_init_lockdep(struct workqueue_struct *wq) +{ + char *lock_name; + + lockdep_register_key(&wq->key); + lock_name = kasprintf(GFP_KERNEL, "%s%s", "(wq_completion)", wq->name); + if (!lock_name) + lock_name = wq->name; + lockdep_init_map(&wq->lockdep_map, lock_name, &wq->key, 0); +} + +static void wq_unregister_lockdep(struct workqueue_struct *wq) +{ + lockdep_unregister_key(&wq->key); +} + +static void wq_free_lockdep(struct workqueue_struct *wq) +{ + if (wq->lock_name != wq->name) + kfree(wq->lock_name); +} +#else +static void wq_init_lockdep(struct workqueue_struct *wq) +{ +} + +static void wq_unregister_lockdep(struct workqueue_struct *wq) +{ +} + +static void wq_free_lockdep(struct workqueue_struct *wq) +{ +} +#endif + static void rcu_free_wq(struct rcu_head *rcu) { struct workqueue_struct *wq = container_of(rcu, struct workqueue_struct, rcu); + wq_free_lockdep(wq); + if (!(wq->flags & WQ_UNBOUND)) free_percpu(wq->cpu_pwqs); else @@ -3532,8 +3572,10 @@ static void pwq_unbound_release_workfn(struct work_struct *work) * If we're the last pwq going away, @wq is already dead and no one * is gonna access it anymore. Schedule RCU free. */ - if (is_last) + if (is_last) { + wq_unregister_lockdep(wq); call_rcu(&wq->rcu, rcu_free_wq); + } } /** @@ -4067,11 +4109,9 @@ static int init_rescuer(struct workqueue_struct *wq) return 0; } -struct workqueue_struct *__alloc_workqueue_key(const char *fmt, - unsigned int flags, - int max_active, - struct lock_class_key *key, - const char *lock_name, ...) +struct workqueue_struct *alloc_workqueue(const char *fmt, + unsigned int flags, + int max_active, ...) { size_t tbl_size = 0; va_list args; @@ -4106,7 +4146,7 @@ struct workqueue_struct *__alloc_workqueue_key(const char *fmt, goto err_free_wq; } - va_start(args, lock_name); + va_start(args, max_active); vsnprintf(wq->name, sizeof(wq->name), fmt, args); va_end(args); @@ -4123,7 +4163,7 @@ struct workqueue_struct *__alloc_workqueue_key(const char *fmt, INIT_LIST_HEAD(&wq->flusher_overflow); INIT_LIST_HEAD(&wq->maydays); - lockdep_init_map(&wq->lockdep_map, lock_name, key, 0); + wq_init_lockdep(wq); INIT_LIST_HEAD(&wq->list); if (alloc_and_link_pwqs(wq) < 0) @@ -4161,7 +4201,7 @@ err_destroy: destroy_workqueue(wq); return NULL; } -EXPORT_SYMBOL_GPL(__alloc_workqueue_key); +EXPORT_SYMBOL_GPL(alloc_workqueue); /** * destroy_workqueue - safely terminate a workqueue @@ -4214,6 +4254,7 @@ void destroy_workqueue(struct workqueue_struct *wq) kthread_stop(wq->rescuer->task); if (!(wq->flags & WQ_UNBOUND)) { + wq_unregister_lockdep(wq); /* * The base ref is never dropped on per-cpu pwqs. Directly * schedule RCU free. diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c index 1e1bbf171eca..a1705545e6ac 100644 --- a/lib/locking-selftest.c +++ b/lib/locking-selftest.c @@ -1989,6 +1989,7 @@ void locking_selftest(void) init_shared_classes(); debug_locks_silent = !debug_locks_verbose; + lockdep_set_selftest_task(current); DO_TESTCASE_6R("A-A deadlock", AA); DO_TESTCASE_6R("A-B-B-A deadlock", ABBA); @@ -2097,5 +2098,6 @@ void locking_selftest(void) printk("---------------------------------\n"); debug_locks = 1; } + lockdep_set_selftest_task(NULL); debug_locks_silent = 0; } diff --git a/lib/refcount.c b/lib/refcount.c index ebcf8cd49e05..6e904af0fb3e 100644 --- a/lib/refcount.c +++ b/lib/refcount.c @@ -33,6 +33,9 @@ * Note that the allocator is responsible for ordering things between free() * and alloc(). * + * The decrements dec_and_test() and sub_and_test() also provide acquire + * ordering on success. + * */ #include <linux/mutex.h> @@ -164,8 +167,8 @@ EXPORT_SYMBOL(refcount_inc_checked); * at UINT_MAX. * * Provides release memory ordering, such that prior loads and stores are done - * before, and provides a control dependency such that free() must come after. - * See the comment on top. + * before, and provides an acquire ordering on success such that free() + * must come after. * * Use of this function is not recommended for the normal reference counting * use case in which references are taken and released one at a time. In these @@ -190,7 +193,12 @@ bool refcount_sub_and_test_checked(unsigned int i, refcount_t *r) } while (!atomic_try_cmpxchg_release(&r->refs, &val, new)); - return !new; + if (!new) { + smp_acquire__after_ctrl_dep(); + return true; + } + return false; + } EXPORT_SYMBOL(refcount_sub_and_test_checked); @@ -202,8 +210,8 @@ EXPORT_SYMBOL(refcount_sub_and_test_checked); * decrement when saturated at UINT_MAX. * * Provides release memory ordering, such that prior loads and stores are done - * before, and provides a control dependency such that free() must come after. - * See the comment on top. + * before, and provides an acquire ordering on success such that free() + * must come after. * * Return: true if the resulting refcount is 0, false otherwise */ diff --git a/scripts/atomic/atomic-tbl.sh b/scripts/atomic/atomic-tbl.sh new file mode 100755 index 000000000000..81d5c32039dd --- /dev/null +++ b/scripts/atomic/atomic-tbl.sh @@ -0,0 +1,186 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# helpers for dealing with atomics.tbl + +#meta_in(meta, match) +meta_in() +{ + case "$1" in + [$2]) return 0;; + esac + + return 1 +} + +#meta_has_ret(meta) +meta_has_ret() +{ + meta_in "$1" "bBiIfFlR" +} + +#meta_has_acquire(meta) +meta_has_acquire() +{ + meta_in "$1" "BFIlR" +} + +#meta_has_release(meta) +meta_has_release() +{ + meta_in "$1" "BFIRs" +} + +#meta_has_relaxed(meta) +meta_has_relaxed() +{ + meta_in "$1" "BFIR" +} + +#find_fallback_template(pfx, name, sfx, order) +find_fallback_template() +{ + local pfx="$1"; shift + local name="$1"; shift + local sfx="$1"; shift + local order="$1"; shift + + local base="" + local file="" + + # We may have fallbacks for a specific case (e.g. read_acquire()), or + # an entire class, e.g. *inc*(). + # + # Start at the most specific, and fall back to the most general. Once + # we find a specific fallback, don't bother looking for more. + for base in "${pfx}${name}${sfx}${order}" "${name}"; do + file="${ATOMICDIR}/fallbacks/${base}" + + if [ -f "${file}" ]; then + printf "${file}" + break + fi + done +} + +#gen_ret_type(meta, int) +gen_ret_type() { + local meta="$1"; shift + local int="$1"; shift + + case "${meta}" in + [sv]) printf "void";; + [bB]) printf "bool";; + [aiIfFlR]) printf "${int}";; + esac +} + +#gen_ret_stmt(meta) +gen_ret_stmt() +{ + if meta_has_ret "${meta}"; then + printf "return "; + fi +} + +# gen_param_name(arg) +gen_param_name() +{ + # strip off the leading 'c' for 'cv' + local name="${1#c}" + printf "${name#*:}" +} + +# gen_param_type(arg, int, atomic) +gen_param_type() +{ + local type="${1%%:*}"; shift + local int="$1"; shift + local atomic="$1"; shift + + case "${type}" in + i) type="${int} ";; + p) type="${int} *";; + v) type="${atomic}_t *";; + cv) type="const ${atomic}_t *";; + esac + + printf "${type}" +} + +#gen_param(arg, int, atomic) +gen_param() +{ + local arg="$1"; shift + local int="$1"; shift + local atomic="$1"; shift + local name="$(gen_param_name "${arg}")" + local type="$(gen_param_type "${arg}" "${int}" "${atomic}")" + + printf "${type}${name}" +} + +#gen_params(int, atomic, arg...) +gen_params() +{ + local int="$1"; shift + local atomic="$1"; shift + + while [ "$#" -gt 0 ]; do + gen_param "$1" "${int}" "${atomic}" + [ "$#" -gt 1 ] && printf ", " + shift; + done +} + +#gen_args(arg...) +gen_args() +{ + while [ "$#" -gt 0 ]; do + printf "$(gen_param_name "$1")" + [ "$#" -gt 1 ] && printf ", " + shift; + done +} + +#gen_proto_order_variants(meta, pfx, name, sfx, ...) +gen_proto_order_variants() +{ + local meta="$1"; shift + local pfx="$1"; shift + local name="$1"; shift + local sfx="$1"; shift + + gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@" + + if meta_has_acquire "${meta}"; then + gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@" + fi + if meta_has_release "${meta}"; then + gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@" + fi + if meta_has_relaxed "${meta}"; then + gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@" + fi +} + +#gen_proto_variants(meta, name, ...) +gen_proto_variants() +{ + local meta="$1"; shift + local name="$1"; shift + local pfx="" + local sfx="" + + meta_in "${meta}" "fF" && pfx="fetch_" + meta_in "${meta}" "R" && sfx="_return" + + gen_proto_order_variants "${meta}" "${pfx}" "${name}" "${sfx}" "$@" +} + +#gen_proto(meta, ...) +gen_proto() { + local meta="$1"; shift + for m in $(echo "${meta}" | grep -o .); do + gen_proto_variants "${m}" "$@" + done +} diff --git a/scripts/atomic/atomics.tbl b/scripts/atomic/atomics.tbl new file mode 100755 index 000000000000..fbee2f6190d9 --- /dev/null +++ b/scripts/atomic/atomics.tbl @@ -0,0 +1,41 @@ +# name meta args... +# +# Where meta contains a string of variants to generate. +# Upper-case implies _{acquire,release,relaxed} variants. +# Valid meta values are: +# * B/b - bool: returns bool +# * v - void: returns void +# * I/i - int: returns base type +# * R - return: returns base type (has _return variants) +# * F/f - fetch: returns base type (has fetch_ variants) +# * l - load: returns base type (has _acquire order variant) +# * s - store: returns void (has _release order variant) +# +# Where args contains list of type[:name], where type is: +# * cv - const pointer to atomic base type (atomic_t/atomic64_t/atomic_long_t) +# * v - pointer to atomic base type (atomic_t/atomic64_t/atomic_long_t) +# * i - base type (int/s64/long) +# * p - pointer to base type (int/s64/long) +# +read l cv +set s v i +add vRF i v +sub vRF i v +inc vRF v +dec vRF v +and vF i v +andnot vF i v +or vF i v +xor vF i v +xchg I v i +cmpxchg I v i:old i:new +try_cmpxchg B v p:old i:new +sub_and_test b i v +dec_and_test b v +inc_and_test b v +add_negative b i v +add_unless fb v i:a i:u +inc_not_zero b v +inc_unless_negative b v +dec_unless_positive b v +dec_if_positive i v diff --git a/scripts/atomic/check-atomics.sh b/scripts/atomic/check-atomics.sh new file mode 100755 index 000000000000..cfa0c2f71c84 --- /dev/null +++ b/scripts/atomic/check-atomics.sh @@ -0,0 +1,33 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# +# Check if atomic headers are up-to-date + +ATOMICDIR=$(dirname $0) +ATOMICTBL=${ATOMICDIR}/atomics.tbl +LINUXDIR=${ATOMICDIR}/../.. + +echo '' | sha1sum - > /dev/null 2>&1 +if [ $? -ne 0 ]; then + printf "sha1sum not available, skipping atomic header checks.\n" + exit 0 +fi + +cat <<EOF | +asm-generic/atomic-instrumented.h +asm-generic/atomic-long.h +linux/atomic-fallback.h +EOF +while read header; do + OLDSUM="$(tail -n 1 ${LINUXDIR}/include/${header})" + OLDSUM="${OLDSUM#// }" + + NEWSUM="$(head -n -1 ${LINUXDIR}/include/${header} | sha1sum)" + NEWSUM="${NEWSUM%% *}" + + if [ "${OLDSUM}" != "${NEWSUM}" ]; then + printf "warning: generated include/${header} has been modified.\n" + fi +done + +exit 0 diff --git a/scripts/atomic/fallbacks/acquire b/scripts/atomic/fallbacks/acquire new file mode 100755 index 000000000000..e38871e64db6 --- /dev/null +++ b/scripts/atomic/fallbacks/acquire @@ -0,0 +1,9 @@ +cat <<EOF +static inline ${ret} +${atomic}_${pfx}${name}${sfx}_acquire(${params}) +{ + ${ret} ret = ${atomic}_${pfx}${name}${sfx}_relaxed(${args}); + __atomic_acquire_fence(); + return ret; +} +EOF diff --git a/scripts/atomic/fallbacks/add_negative b/scripts/atomic/fallbacks/add_negative new file mode 100755 index 000000000000..e6f4815637de --- /dev/null +++ b/scripts/atomic/fallbacks/add_negative @@ -0,0 +1,16 @@ +cat <<EOF +/** + * ${atomic}_add_negative - add and test if negative + * @i: integer value to add + * @v: pointer of type ${atomic}_t + * + * Atomically adds @i to @v and returns true + * if the result is negative, or false when + * result is greater than or equal to zero. + */ +static inline bool +${atomic}_add_negative(${int} i, ${atomic}_t *v) +{ + return ${atomic}_add_return(i, v) < 0; +} +EOF diff --git a/scripts/atomic/fallbacks/add_unless b/scripts/atomic/fallbacks/add_unless new file mode 100755 index 000000000000..792533885fbf --- /dev/null +++ b/scripts/atomic/fallbacks/add_unless @@ -0,0 +1,16 @@ +cat << EOF +/** + * ${atomic}_add_unless - add unless the number is already a given value + * @v: pointer of type ${atomic}_t + * @a: the amount to add to v... + * @u: ...unless v is equal to u. + * + * Atomically adds @a to @v, if @v was not already @u. + * Returns true if the addition was done. + */ +static inline bool +${atomic}_add_unless(${atomic}_t *v, ${int} a, ${int} u) +{ + return ${atomic}_fetch_add_unless(v, a, u) != u; +} +EOF diff --git a/scripts/atomic/fallbacks/andnot b/scripts/atomic/fallbacks/andnot new file mode 100755 index 000000000000..9f3a3216b5e3 --- /dev/null +++ b/scripts/atomic/fallbacks/andnot @@ -0,0 +1,7 @@ +cat <<EOF +static inline ${ret} +${atomic}_${pfx}andnot${sfx}${order}(${int} i, ${atomic}_t *v) +{ + ${retstmt}${atomic}_${pfx}and${sfx}${order}(~i, v); +} +EOF diff --git a/scripts/atomic/fallbacks/dec b/scripts/atomic/fallbacks/dec new file mode 100755 index 000000000000..10bbc82be31d --- /dev/null +++ b/scripts/atomic/fallbacks/dec @@ -0,0 +1,7 @@ +cat <<EOF +static inline ${ret} +${atomic}_${pfx}dec${sfx}${order}(${atomic}_t *v) +{ + ${retstmt}${atomic}_${pfx}sub${sfx}${order}(1, v); +} +EOF diff --git a/scripts/atomic/fallbacks/dec_and_test b/scripts/atomic/fallbacks/dec_and_test new file mode 100755 index 000000000000..0ce7103b3df2 --- /dev/null +++ b/scripts/atomic/fallbacks/dec_and_test @@ -0,0 +1,15 @@ +cat <<EOF +/** + * ${atomic}_dec_and_test - decrement and test + * @v: pointer of type ${atomic}_t + * + * Atomically decrements @v by 1 and + * returns true if the result is 0, or false for all other + * cases. + */ +static inline bool +${atomic}_dec_and_test(${atomic}_t *v) +{ + return ${atomic}_dec_return(v) == 0; +} +EOF diff --git a/scripts/atomic/fallbacks/dec_if_positive b/scripts/atomic/fallbacks/dec_if_positive new file mode 100755 index 000000000000..c52eacec43c8 --- /dev/null +++ b/scripts/atomic/fallbacks/dec_if_positive @@ -0,0 +1,15 @@ +cat <<EOF +static inline ${ret} +${atomic}_dec_if_positive(${atomic}_t *v) +{ + ${int} dec, c = ${atomic}_read(v); + + do { + dec = c - 1; + if (unlikely(dec < 0)) + break; + } while (!${atomic}_try_cmpxchg(v, &c, dec)); + + return dec; +} +EOF diff --git a/scripts/atomic/fallbacks/dec_unless_positive b/scripts/atomic/fallbacks/dec_unless_positive new file mode 100755 index 000000000000..8a2578f14268 --- /dev/null +++ b/scripts/atomic/fallbacks/dec_unless_positive @@ -0,0 +1,14 @@ +cat <<EOF +static inline bool +${atomic}_dec_unless_positive(${atomic}_t *v) +{ + ${int} c = ${atomic}_read(v); + + do { + if (unlikely(c > 0)) + return false; + } while (!${atomic}_try_cmpxchg(v, &c, c - 1)); + + return true; +} +EOF diff --git a/scripts/atomic/fallbacks/fence b/scripts/atomic/fallbacks/fence new file mode 100755 index 000000000000..82f68fa6931a --- /dev/null +++ b/scripts/atomic/fallbacks/fence @@ -0,0 +1,11 @@ +cat <<EOF +static inline ${ret} +${atomic}_${pfx}${name}${sfx}(${params}) +{ + ${ret} ret; + __atomic_pre_full_fence(); + ret = ${atomic}_${pfx}${name}${sfx}_relaxed(${args}); + __atomic_post_full_fence(); + return ret; +} +EOF diff --git a/scripts/atomic/fallbacks/fetch_add_unless b/scripts/atomic/fallbacks/fetch_add_unless new file mode 100755 index 000000000000..d2c091db7eae --- /dev/null +++ b/scripts/atomic/fallbacks/fetch_add_unless @@ -0,0 +1,23 @@ +cat << EOF +/** + * ${atomic}_fetch_add_unless - add unless the number is already a given value + * @v: pointer of type ${atomic}_t + * @a: the amount to add to v... + * @u: ...unless v is equal to u. + * + * Atomically adds @a to @v, so long as @v was not already @u. + * Returns original value of @v + */ +static inline ${int} +${atomic}_fetch_add_unless(${atomic}_t *v, ${int} a, ${int} u) +{ + ${int} c = ${atomic}_read(v); + + do { + if (unlikely(c == u)) + break; + } while (!${atomic}_try_cmpxchg(v, &c, c + a)); + + return c; +} +EOF diff --git a/scripts/atomic/fallbacks/inc b/scripts/atomic/fallbacks/inc new file mode 100755 index 000000000000..f866b3ad2353 --- /dev/null +++ b/scripts/atomic/fallbacks/inc @@ -0,0 +1,7 @@ +cat <<EOF +static inline ${ret} +${atomic}_${pfx}inc${sfx}${order}(${atomic}_t *v) +{ + ${retstmt}${atomic}_${pfx}add${sfx}${order}(1, v); +} +EOF diff --git a/scripts/atomic/fallbacks/inc_and_test b/scripts/atomic/fallbacks/inc_and_test new file mode 100755 index 000000000000..4e2068869f7e --- /dev/null +++ b/scripts/atomic/fallbacks/inc_and_test @@ -0,0 +1,15 @@ +cat <<EOF +/** + * ${atomic}_inc_and_test - increment and test + * @v: pointer of type ${atomic}_t + * + * Atomically increments @v by 1 + * and returns true if the result is zero, or false for all + * other cases. + */ +static inline bool +${atomic}_inc_and_test(${atomic}_t *v) +{ + return ${atomic}_inc_return(v) == 0; +} +EOF diff --git a/scripts/atomic/fallbacks/inc_not_zero b/scripts/atomic/fallbacks/inc_not_zero new file mode 100755 index 000000000000..a7c45c8d107c --- /dev/null +++ b/scripts/atomic/fallbacks/inc_not_zero @@ -0,0 +1,14 @@ +cat <<EOF +/** + * ${atomic}_inc_not_zero - increment unless the number is zero + * @v: pointer of type ${atomic}_t + * + * Atomically increments @v by 1, if @v is non-zero. + * Returns true if the increment was done. + */ +static inline bool +${atomic}_inc_not_zero(${atomic}_t *v) +{ + return ${atomic}_add_unless(v, 1, 0); +} +EOF diff --git a/scripts/atomic/fallbacks/inc_unless_negative b/scripts/atomic/fallbacks/inc_unless_negative new file mode 100755 index 000000000000..0c266e71dbd4 --- /dev/null +++ b/scripts/atomic/fallbacks/inc_unless_negative @@ -0,0 +1,14 @@ +cat <<EOF +static inline bool +${atomic}_inc_unless_negative(${atomic}_t *v) +{ + ${int} c = ${atomic}_read(v); + + do { + if (unlikely(c < 0)) + return false; + } while (!${atomic}_try_cmpxchg(v, &c, c + 1)); + + return true; +} +EOF diff --git a/scripts/atomic/fallbacks/read_acquire b/scripts/atomic/fallbacks/read_acquire new file mode 100755 index 000000000000..75863b5203f7 --- /dev/null +++ b/scripts/atomic/fallbacks/read_acquire @@ -0,0 +1,7 @@ +cat <<EOF +static inline ${ret} +${atomic}_read_acquire(const ${atomic}_t *v) +{ + return smp_load_acquire(&(v)->counter); +} +EOF diff --git a/scripts/atomic/fallbacks/release b/scripts/atomic/fallbacks/release new file mode 100755 index 000000000000..3f628a3802d9 --- /dev/null +++ b/scripts/atomic/fallbacks/release @@ -0,0 +1,8 @@ +cat <<EOF +static inline ${ret} +${atomic}_${pfx}${name}${sfx}_release(${params}) +{ + __atomic_release_fence(); + ${retstmt}${atomic}_${pfx}${name}${sfx}_relaxed(${args}); +} +EOF diff --git a/scripts/atomic/fallbacks/set_release b/scripts/atomic/fallbacks/set_release new file mode 100755 index 000000000000..45bb5e0cfc08 --- /dev/null +++ b/scripts/atomic/fallbacks/set_release @@ -0,0 +1,7 @@ +cat <<EOF +static inline void +${atomic}_set_release(${atomic}_t *v, ${int} i) +{ + smp_store_release(&(v)->counter, i); +} +EOF diff --git a/scripts/atomic/fallbacks/sub_and_test b/scripts/atomic/fallbacks/sub_and_test new file mode 100755 index 000000000000..289ef17a2d7a --- /dev/null +++ b/scripts/atomic/fallbacks/sub_and_test @@ -0,0 +1,16 @@ +cat <<EOF +/** + * ${atomic}_sub_and_test - subtract value from variable and test result + * @i: integer value to subtract + * @v: pointer of type ${atomic}_t + * + * Atomically subtracts @i from @v and returns + * true if the result is zero, or false for all + * other cases. + */ +static inline bool +${atomic}_sub_and_test(${int} i, ${atomic}_t *v) +{ + return ${atomic}_sub_return(i, v) == 0; +} +EOF diff --git a/scripts/atomic/fallbacks/try_cmpxchg b/scripts/atomic/fallbacks/try_cmpxchg new file mode 100755 index 000000000000..4ed85e2f5378 --- /dev/null +++ b/scripts/atomic/fallbacks/try_cmpxchg @@ -0,0 +1,11 @@ +cat <<EOF +static inline bool +${atomic}_try_cmpxchg${order}(${atomic}_t *v, ${int} *old, ${int} new) +{ + ${int} r, o = *old; + r = ${atomic}_cmpxchg${order}(v, o, new); + if (unlikely(r != o)) + *old = r; + return likely(r == o); +} +EOF diff --git a/scripts/atomic/gen-atomic-fallback.sh b/scripts/atomic/gen-atomic-fallback.sh new file mode 100755 index 000000000000..1bd7c1707633 --- /dev/null +++ b/scripts/atomic/gen-atomic-fallback.sh @@ -0,0 +1,181 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +ATOMICDIR=$(dirname $0) + +. ${ATOMICDIR}/atomic-tbl.sh + +#gen_template_fallback(template, meta, pfx, name, sfx, order, atomic, int, args...) +gen_template_fallback() +{ + local template="$1"; shift + local meta="$1"; shift + local pfx="$1"; shift + local name="$1"; shift + local sfx="$1"; shift + local order="$1"; shift + local atomic="$1"; shift + local int="$1"; shift + + local atomicname="${atomic}_${pfx}${name}${sfx}${order}" + + local ret="$(gen_ret_type "${meta}" "${int}")" + local retstmt="$(gen_ret_stmt "${meta}")" + local params="$(gen_params "${int}" "${atomic}" "$@")" + local args="$(gen_args "$@")" + + if [ ! -z "${template}" ]; then + printf "#ifndef ${atomicname}\n" + . ${template} + printf "#define ${atomicname} ${atomicname}\n" + printf "#endif\n\n" + fi +} + +#gen_proto_fallback(meta, pfx, name, sfx, order, atomic, int, args...) +gen_proto_fallback() +{ + local meta="$1"; shift + local pfx="$1"; shift + local name="$1"; shift + local sfx="$1"; shift + local order="$1"; shift + + local tmpl="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")" + gen_template_fallback "${tmpl}" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "$@" +} + +#gen_basic_fallbacks(basename) +gen_basic_fallbacks() +{ + local basename="$1"; shift +cat << EOF +#define ${basename}_acquire ${basename} +#define ${basename}_release ${basename} +#define ${basename}_relaxed ${basename} +EOF +} + +#gen_proto_order_variants(meta, pfx, name, sfx, atomic, int, args...) +gen_proto_order_variants() +{ + local meta="$1"; shift + local pfx="$1"; shift + local name="$1"; shift + local sfx="$1"; shift + local atomic="$1" + + local basename="${atomic}_${pfx}${name}${sfx}" + + local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")" + + # If we don't have relaxed atomics, then we don't bother with ordering fallbacks + # read_acquire and set_release need to be templated, though + if ! meta_has_relaxed "${meta}"; then + gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@" + + if meta_has_acquire "${meta}"; then + gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@" + fi + + if meta_has_release "${meta}"; then + gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@" + fi + + return + fi + + printf "#ifndef ${basename}_relaxed\n" + + if [ ! -z "${template}" ]; then + printf "#ifdef ${basename}\n" + fi + + gen_basic_fallbacks "${basename}" + + if [ ! -z "${template}" ]; then + printf "#endif /* ${atomic}_${pfx}${name}${sfx} */\n\n" + gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@" + gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@" + gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@" + gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@" + fi + + printf "#else /* ${basename}_relaxed */\n\n" + + gen_template_fallback "${ATOMICDIR}/fallbacks/acquire" "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@" + gen_template_fallback "${ATOMICDIR}/fallbacks/release" "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@" + gen_template_fallback "${ATOMICDIR}/fallbacks/fence" "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@" + + printf "#endif /* ${basename}_relaxed */\n\n" +} + +gen_xchg_fallbacks() +{ + local xchg="$1"; shift +cat <<EOF +#ifndef ${xchg}_relaxed +#define ${xchg}_relaxed ${xchg} +#define ${xchg}_acquire ${xchg} +#define ${xchg}_release ${xchg} +#else /* ${xchg}_relaxed */ + +#ifndef ${xchg}_acquire +#define ${xchg}_acquire(...) \\ + __atomic_op_acquire(${xchg}, __VA_ARGS__) +#endif + +#ifndef ${xchg}_release +#define ${xchg}_release(...) \\ + __atomic_op_release(${xchg}, __VA_ARGS__) +#endif + +#ifndef ${xchg} +#define ${xchg}(...) \\ + __atomic_op_fence(${xchg}, __VA_ARGS__) +#endif + +#endif /* ${xchg}_relaxed */ + +EOF +} + +cat << EOF +// SPDX-License-Identifier: GPL-2.0 + +// Generated by $0 +// DO NOT MODIFY THIS FILE DIRECTLY + +#ifndef _LINUX_ATOMIC_FALLBACK_H +#define _LINUX_ATOMIC_FALLBACK_H + +EOF + +for xchg in "xchg" "cmpxchg" "cmpxchg64"; do + gen_xchg_fallbacks "${xchg}" +done + +grep '^[a-z]' "$1" | while read name meta args; do + gen_proto "${meta}" "${name}" "atomic" "int" ${args} +done + +cat <<EOF +#define atomic_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c)) +#define atomic_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c)) + +#ifdef CONFIG_GENERIC_ATOMIC64 +#include <asm-generic/atomic64.h> +#endif + +EOF + +grep '^[a-z]' "$1" | while read name meta args; do + gen_proto "${meta}" "${name}" "atomic64" "s64" ${args} +done + +cat <<EOF +#define atomic64_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c)) +#define atomic64_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c)) + +#endif /* _LINUX_ATOMIC_FALLBACK_H */ +EOF diff --git a/scripts/atomic/gen-atomic-instrumented.sh b/scripts/atomic/gen-atomic-instrumented.sh new file mode 100755 index 000000000000..e09812372b17 --- /dev/null +++ b/scripts/atomic/gen-atomic-instrumented.sh @@ -0,0 +1,182 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +ATOMICDIR=$(dirname $0) + +. ${ATOMICDIR}/atomic-tbl.sh + +#gen_param_check(arg) +gen_param_check() +{ + local arg="$1"; shift + local type="${arg%%:*}" + local name="$(gen_param_name "${arg}")" + local rw="write" + + case "${type#c}" in + i) return;; + esac + + # We don't write to constant parameters + [ ${type#c} != ${type} ] && rw="read" + + printf "\tkasan_check_${rw}(${name}, sizeof(*${name}));\n" +} + +#gen_param_check(arg...) +gen_params_checks() +{ + while [ "$#" -gt 0 ]; do + gen_param_check "$1" + shift; + done +} + +# gen_guard(meta, atomic, pfx, name, sfx, order) +gen_guard() +{ + local meta="$1"; shift + local atomic="$1"; shift + local pfx="$1"; shift + local name="$1"; shift + local sfx="$1"; shift + local order="$1"; shift + + local atomicname="arch_${atomic}_${pfx}${name}${sfx}${order}" + + local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")" + + # We definitely need a preprocessor symbol for this atomic if it is an + # ordering variant, or if there's a generic fallback. + if [ ! -z "${order}" ] || [ ! -z "${template}" ]; then + printf "defined(${atomicname})" + return + fi + + # If this is a base variant, but a relaxed variant *may* exist, then we + # only have a preprocessor symbol if the relaxed variant isn't defined + if meta_has_relaxed "${meta}"; then + printf "!defined(${atomicname}_relaxed) || defined(${atomicname})" + fi +} + +#gen_proto_order_variant(meta, pfx, name, sfx, order, atomic, int, arg...) +gen_proto_order_variant() +{ + local meta="$1"; shift + local pfx="$1"; shift + local name="$1"; shift + local sfx="$1"; shift + local order="$1"; shift + local atomic="$1"; shift + local int="$1"; shift + + local atomicname="${atomic}_${pfx}${name}${sfx}${order}" + + local guard="$(gen_guard "${meta}" "${atomic}" "${pfx}" "${name}" "${sfx}" "${order}")" + + local ret="$(gen_ret_type "${meta}" "${int}")" + local params="$(gen_params "${int}" "${atomic}" "$@")" + local checks="$(gen_params_checks "$@")" + local args="$(gen_args "$@")" + local retstmt="$(gen_ret_stmt "${meta}")" + + [ ! -z "${guard}" ] && printf "#if ${guard}\n" + +cat <<EOF +static inline ${ret} +${atomicname}(${params}) +{ +${checks} + ${retstmt}arch_${atomicname}(${args}); +} +#define ${atomicname} ${atomicname} +EOF + + [ ! -z "${guard}" ] && printf "#endif\n" + + printf "\n" +} + +gen_xchg() +{ + local xchg="$1"; shift + local mult="$1"; shift + +cat <<EOF +#define ${xchg}(ptr, ...) \\ +({ \\ + typeof(ptr) __ai_ptr = (ptr); \\ + kasan_check_write(__ai_ptr, ${mult}sizeof(*__ai_ptr)); \\ + arch_${xchg}(__ai_ptr, __VA_ARGS__); \\ +}) +EOF +} + +gen_optional_xchg() +{ + local name="$1"; shift + local sfx="$1"; shift + local guard="defined(arch_${name}${sfx})" + + [ -z "${sfx}" ] && guard="!defined(arch_${name}_relaxed) || defined(arch_${name})" + + printf "#if ${guard}\n" + gen_xchg "${name}${sfx}" "" + printf "#endif\n\n" +} + +cat << EOF +// SPDX-License-Identifier: GPL-2.0 + +// Generated by $0 +// DO NOT MODIFY THIS FILE DIRECTLY + +/* + * This file provides wrappers with KASAN instrumentation for atomic operations. + * To use this functionality an arch's atomic.h file needs to define all + * atomic operations with arch_ prefix (e.g. arch_atomic_read()) and include + * this file at the end. This file provides atomic_read() that forwards to + * arch_atomic_read() for actual atomic operation. + * Note: if an arch atomic operation is implemented by means of other atomic + * operations (e.g. atomic_read()/atomic_cmpxchg() loop), then it needs to use + * arch_ variants (i.e. arch_atomic_read()/arch_atomic_cmpxchg()) to avoid + * double instrumentation. + */ +#ifndef _ASM_GENERIC_ATOMIC_INSTRUMENTED_H +#define _ASM_GENERIC_ATOMIC_INSTRUMENTED_H + +#include <linux/build_bug.h> +#include <linux/kasan-checks.h> + +EOF + +grep '^[a-z]' "$1" | while read name meta args; do + gen_proto "${meta}" "${name}" "atomic" "int" ${args} +done + +grep '^[a-z]' "$1" | while read name meta args; do + gen_proto "${meta}" "${name}" "atomic64" "s64" ${args} +done + +for xchg in "xchg" "cmpxchg" "cmpxchg64"; do + for order in "" "_acquire" "_release" "_relaxed"; do + gen_optional_xchg "${xchg}" "${order}" + done +done + +for xchg in "cmpxchg_local" "cmpxchg64_local" "sync_cmpxchg"; do + gen_xchg "${xchg}" "" + printf "\n" +done + +gen_xchg "cmpxchg_double" "2 * " + +printf "\n\n" + +gen_xchg "cmpxchg_double_local" "2 * " + +cat <<EOF + +#endif /* _ASM_GENERIC_ATOMIC_INSTRUMENTED_H */ +EOF diff --git a/scripts/atomic/gen-atomic-long.sh b/scripts/atomic/gen-atomic-long.sh new file mode 100755 index 000000000000..c240a7231b2e --- /dev/null +++ b/scripts/atomic/gen-atomic-long.sh @@ -0,0 +1,101 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +ATOMICDIR=$(dirname $0) + +. ${ATOMICDIR}/atomic-tbl.sh + +#gen_cast(arg, int, atomic) +gen_cast() +{ + local arg="$1"; shift + local int="$1"; shift + local atomic="$1"; shift + + [ "${arg%%:*}" = "p" ] || return + + printf "($(gen_param_type "${arg}" "${int}" "${atomic}"))" +} + +#gen_args_cast(int, atomic, arg...) +gen_args_cast() +{ + local int="$1"; shift + local atomic="$1"; shift + + while [ "$#" -gt 0 ]; do + local cast="$(gen_cast "$1" "${int}" "${atomic}")" + local arg="$(gen_param_name "$1")" + printf "${cast}${arg}" + [ "$#" -gt 1 ] && printf ", " + shift; + done +} + +#gen_proto_order_variant(meta, pfx, name, sfx, order, atomic, int, arg...) +gen_proto_order_variant() +{ + local meta="$1"; shift + local name="$1$2$3$4"; shift; shift; shift; shift + local atomic="$1"; shift + local int="$1"; shift + + local ret="$(gen_ret_type "${meta}" "long")" + local params="$(gen_params "long" "atomic_long" "$@")" + local argscast="$(gen_args_cast "${int}" "${atomic}" "$@")" + local retstmt="$(gen_ret_stmt "${meta}")" + +cat <<EOF +static inline ${ret} +atomic_long_${name}(${params}) +{ + ${retstmt}${atomic}_${name}(${argscast}); +} + +EOF +} + +cat << EOF +// SPDX-License-Identifier: GPL-2.0 + +// Generated by $0 +// DO NOT MODIFY THIS FILE DIRECTLY + +#ifndef _ASM_GENERIC_ATOMIC_LONG_H +#define _ASM_GENERIC_ATOMIC_LONG_H + +#include <asm/types.h> + +#ifdef CONFIG_64BIT +typedef atomic64_t atomic_long_t; +#define ATOMIC_LONG_INIT(i) ATOMIC64_INIT(i) +#define atomic_long_cond_read_acquire atomic64_cond_read_acquire +#define atomic_long_cond_read_relaxed atomic64_cond_read_relaxed +#else +typedef atomic_t atomic_long_t; +#define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i) +#define atomic_long_cond_read_acquire atomic_cond_read_acquire +#define atomic_long_cond_read_relaxed atomic_cond_read_relaxed +#endif + +#ifdef CONFIG_64BIT + +EOF + +grep '^[a-z]' "$1" | while read name meta args; do + gen_proto "${meta}" "${name}" "atomic64" "s64" ${args} +done + +cat <<EOF +#else /* CONFIG_64BIT */ + +EOF + +grep '^[a-z]' "$1" | while read name meta args; do + gen_proto "${meta}" "${name}" "atomic" "int" ${args} +done + +cat <<EOF +#endif /* CONFIG_64BIT */ +#endif /* _ASM_GENERIC_ATOMIC_LONG_H */ +EOF diff --git a/scripts/atomic/gen-atomics.sh b/scripts/atomic/gen-atomics.sh new file mode 100644 index 000000000000..27400b0cd732 --- /dev/null +++ b/scripts/atomic/gen-atomics.sh @@ -0,0 +1,20 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# +# Generate atomic headers + +ATOMICDIR=$(dirname $0) +ATOMICTBL=${ATOMICDIR}/atomics.tbl +LINUXDIR=${ATOMICDIR}/../.. + +cat <<EOF | +gen-atomic-instrumented.sh asm-generic/atomic-instrumented.h +gen-atomic-long.sh asm-generic/atomic-long.h +gen-atomic-fallback.sh linux/atomic-fallback.h +EOF +while read script header; do + ${ATOMICDIR}/${script} ${ATOMICTBL} > ${LINUXDIR}/include/${header} + HASH="$(sha1sum ${LINUXDIR}/include/${header})" + HASH="${HASH%% *}" + printf "// %s\n" "${HASH}" >> ${LINUXDIR}/include/${header} +done diff --git a/tools/lib/lockdep/include/liblockdep/common.h b/tools/lib/lockdep/include/liblockdep/common.h index d640a9761f09..a81d91d4fc78 100644 --- a/tools/lib/lockdep/include/liblockdep/common.h +++ b/tools/lib/lockdep/include/liblockdep/common.h @@ -45,6 +45,8 @@ void lock_acquire(struct lockdep_map *lock, unsigned int subclass, void lock_release(struct lockdep_map *lock, int nested, unsigned long ip); void lockdep_reset_lock(struct lockdep_map *lock); +void lockdep_register_key(struct lock_class_key *key); +void lockdep_unregister_key(struct lock_class_key *key); extern void debug_check_no_locks_freed(const void *from, unsigned long len); #define STATIC_LOCKDEP_MAP_INIT(_name, _key) \ diff --git a/tools/lib/lockdep/include/liblockdep/mutex.h b/tools/lib/lockdep/include/liblockdep/mutex.h index 2073d4e1f2f0..783dd0df06f9 100644 --- a/tools/lib/lockdep/include/liblockdep/mutex.h +++ b/tools/lib/lockdep/include/liblockdep/mutex.h @@ -7,6 +7,7 @@ struct liblockdep_pthread_mutex { pthread_mutex_t mutex; + struct lock_class_key key; struct lockdep_map dep_map; }; @@ -27,11 +28,10 @@ static inline int __mutex_init(liblockdep_pthread_mutex_t *lock, return pthread_mutex_init(&lock->mutex, __mutexattr); } -#define liblockdep_pthread_mutex_init(mutex, mutexattr) \ -({ \ - static struct lock_class_key __key; \ - \ - __mutex_init((mutex), #mutex, &__key, (mutexattr)); \ +#define liblockdep_pthread_mutex_init(mutex, mutexattr) \ +({ \ + lockdep_register_key(&(mutex)->key); \ + __mutex_init((mutex), #mutex, &(mutex)->key, (mutexattr)); \ }) static inline int liblockdep_pthread_mutex_lock(liblockdep_pthread_mutex_t *lock) @@ -55,6 +55,7 @@ static inline int liblockdep_pthread_mutex_trylock(liblockdep_pthread_mutex_t *l static inline int liblockdep_pthread_mutex_destroy(liblockdep_pthread_mutex_t *lock) { lockdep_reset_lock(&lock->dep_map); + lockdep_unregister_key(&lock->key); return pthread_mutex_destroy(&lock->mutex); } diff --git a/tools/lib/lockdep/run_tests.sh b/tools/lib/lockdep/run_tests.sh index c8fbd0306960..11f425662b43 100755 --- a/tools/lib/lockdep/run_tests.sh +++ b/tools/lib/lockdep/run_tests.sh @@ -11,7 +11,7 @@ find tests -name '*.c' | sort | while read -r i; do testname=$(basename "$i" .c) echo -ne "$testname... " if gcc -o "tests/$testname" -pthread "$i" liblockdep.a -Iinclude -D__USE_LIBLOCKDEP && - timeout 1 "tests/$testname" 2>&1 | "tests/${testname}.sh"; then + timeout 1 "tests/$testname" 2>&1 | /bin/bash "tests/${testname}.sh"; then echo "PASSED!" else echo "FAILED!" @@ -24,7 +24,7 @@ find tests -name '*.c' | sort | while read -r i; do echo -ne "(PRELOAD) $testname... " if gcc -o "tests/$testname" -pthread -Iinclude "$i" && timeout 1 ./lockdep "tests/$testname" 2>&1 | - "tests/${testname}.sh"; then + /bin/bash "tests/${testname}.sh"; then echo "PASSED!" else echo "FAILED!" @@ -37,7 +37,7 @@ find tests -name '*.c' | sort | while read -r i; do echo -ne "(PRELOAD + Valgrind) $testname... " if gcc -o "tests/$testname" -pthread -Iinclude "$i" && { timeout 10 valgrind --read-var-info=yes ./lockdep "./tests/$testname" >& "tests/${testname}.vg.out"; true; } && - "tests/${testname}.sh" < "tests/${testname}.vg.out" && + /bin/bash "tests/${testname}.sh" < "tests/${testname}.vg.out" && ! grep -Eq '(^==[0-9]*== (Invalid |Uninitialised ))|Mismatched free|Source and destination overlap| UME ' "tests/${testname}.vg.out"; then echo "PASSED!" else diff --git a/tools/lib/lockdep/tests/ABBA.c b/tools/lib/lockdep/tests/ABBA.c index 623313f54720..543789bc3e37 100644 --- a/tools/lib/lockdep/tests/ABBA.c +++ b/tools/lib/lockdep/tests/ABBA.c @@ -14,4 +14,13 @@ void main(void) pthread_mutex_destroy(&b); pthread_mutex_destroy(&a); + + pthread_mutex_init(&a, NULL); + pthread_mutex_init(&b, NULL); + + LOCK_UNLOCK_2(a, b); + LOCK_UNLOCK_2(b, a); + + pthread_mutex_destroy(&b); + pthread_mutex_destroy(&a); } |