Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking updates from Ingo Molnar:
 "The main changes in this cycle were:

   - A comprehensive rewrite of the robust/PI futex code's exit handling
     to fix various exit races. (Thomas Gleixner et al)

   - Rework the generic REFCOUNT_FULL implementation using
     atomic_fetch_* operations so that the performance impact of the
     cmpxchg() loops is mitigated for common refcount operations.

     With these performance improvements the generic implementation of
     refcount_t should be good enough for everybody - and this got
     confirmed by performance testing, so remove ARCH_HAS_REFCOUNT and
     REFCOUNT_FULL entirely, leaving the generic implementation enabled
     unconditionally. (Will Deacon)

   - Other misc changes, fixes, cleanups"

* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)
  lkdtm: Remove references to CONFIG_REFCOUNT_FULL
  locking/refcount: Remove unused 'refcount_error_report()' function
  locking/refcount: Consolidate implementations of refcount_t
  locking/refcount: Consolidate REFCOUNT_{MAX,SATURATED} definitions
  locking/refcount: Move saturation warnings out of line
  locking/refcount: Improve performance of generic REFCOUNT_FULL code
  locking/refcount: Move the bulk of the REFCOUNT_FULL implementation into the <linux/refcount.h> header
  locking/refcount: Remove unused refcount_*_checked() variants
  locking/refcount: Ensure integer operands are treated as signed
  locking/refcount: Define constants for saturation and max refcount values
  futex: Prevent exit livelock
  futex: Provide distinct return value when owner is exiting
  futex: Add mutex around futex exit
  futex: Provide state handling for exec() as well
  futex: Sanitize exit state handling
  futex: Mark the begin of futex exit explicitly
  futex: Set task::futex_state to DEAD right after handling futex exit
  futex: Split futex_mm_release() for exit/exec
  exit/exec: Seperate mm_release()
  futex: Replace PF_EXITPIDONE with a state
  ...

4 files changed, 11 insertions, 12 deletions

diff --git a/tools/lib/lockdep/include/liblockdep/common.h b/tools/lib/lockdep/include/liblockdep/common.h
index a81d91d4fc78..a6d7ee5f18ba 100644
--- a/tools/lib/lockdep/include/liblockdep/common.h
+++ b/tools/lib/lockdep/include/liblockdep/common.h
@@ -42,8 +42,7 @@ void lockdep_init_map(struct lockdep_map *lock, const char *name,
 void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
 			int trylock, int read, int check,
 			struct lockdep_map *nest_lock, unsigned long ip);
-void lock_release(struct lockdep_map *lock, int nested,
-			unsigned long ip);
+void lock_release(struct lockdep_map *lock, 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);
diff --git a/tools/lib/lockdep/include/liblockdep/mutex.h b/tools/lib/lockdep/include/liblockdep/mutex.h
index 783dd0df06f9..bd106b82759b 100644
--- a/tools/lib/lockdep/include/liblockdep/mutex.h
+++ b/tools/lib/lockdep/include/liblockdep/mutex.h
@@ -42,7 +42,7 @@ static inline int liblockdep_pthread_mutex_lock(liblockdep_pthread_mutex_t *lock
 
 static inline int liblockdep_pthread_mutex_unlock(liblockdep_pthread_mutex_t *lock)
 {
-	lock_release(&lock->dep_map, 0, (unsigned long)_RET_IP_);
+	lock_release(&lock->dep_map, (unsigned long)_RET_IP_);
 	return pthread_mutex_unlock(&lock->mutex);
 }
 
diff --git a/tools/lib/lockdep/include/liblockdep/rwlock.h b/tools/lib/lockdep/include/liblockdep/rwlock.h
index 365762e3a1ea..6d5d2932bf4d 100644
--- a/tools/lib/lockdep/include/liblockdep/rwlock.h
+++ b/tools/lib/lockdep/include/liblockdep/rwlock.h
@@ -44,7 +44,7 @@ static inline int liblockdep_pthread_rwlock_rdlock(liblockdep_pthread_rwlock_t *
 
 static inline int liblockdep_pthread_rwlock_unlock(liblockdep_pthread_rwlock_t *lock)
 {
-	lock_release(&lock->dep_map, 0, (unsigned long)_RET_IP_);
+	lock_release(&lock->dep_map, (unsigned long)_RET_IP_);
 	return pthread_rwlock_unlock(&lock->rwlock);
 }
 
diff --git a/tools/lib/lockdep/preload.c b/tools/lib/lockdep/preload.c
index 76245d16196d..8f1adbe887b2 100644
--- a/tools/lib/lockdep/preload.c
+++ b/tools/lib/lockdep/preload.c
@@ -270,7 +270,7 @@ int pthread_mutex_lock(pthread_mutex_t *mutex)
 	 */
 	r = ll_pthread_mutex_lock(mutex);
 	if (r)
-		lock_release(&__get_lock(mutex)->dep_map, 0, (unsigned long)_RET_IP_);
+		lock_release(&__get_lock(mutex)->dep_map, (unsigned long)_RET_IP_);
 
 	return r;
 }
@@ -284,7 +284,7 @@ int pthread_mutex_trylock(pthread_mutex_t *mutex)
 	lock_acquire(&__get_lock(mutex)->dep_map, 0, 1, 0, 1, NULL, (unsigned long)_RET_IP_);
 	r = ll_pthread_mutex_trylock(mutex);
 	if (r)
-		lock_release(&__get_lock(mutex)->dep_map, 0, (unsigned long)_RET_IP_);
+		lock_release(&__get_lock(mutex)->dep_map, (unsigned long)_RET_IP_);
 
 	return r;
 }
@@ -295,7 +295,7 @@ int pthread_mutex_unlock(pthread_mutex_t *mutex)
 
 	try_init_preload();
 
-	lock_release(&__get_lock(mutex)->dep_map, 0, (unsigned long)_RET_IP_);
+	lock_release(&__get_lock(mutex)->dep_map, (unsigned long)_RET_IP_);
 	/*
 	 * Just like taking a lock, only in reverse!
 	 *
@@ -355,7 +355,7 @@ int pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
 	lock_acquire(&__get_lock(rwlock)->dep_map, 0, 0, 2, 1, NULL, (unsigned long)_RET_IP_);
 	r = ll_pthread_rwlock_rdlock(rwlock);
 	if (r)
-		lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
+		lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
 
 	return r;
 }
@@ -369,7 +369,7 @@ int pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
 	lock_acquire(&__get_lock(rwlock)->dep_map, 0, 1, 2, 1, NULL, (unsigned long)_RET_IP_);
 	r = ll_pthread_rwlock_tryrdlock(rwlock);
 	if (r)
-		lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
+		lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
 
 	return r;
 }
@@ -383,7 +383,7 @@ int pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock)
 	lock_acquire(&__get_lock(rwlock)->dep_map, 0, 1, 0, 1, NULL, (unsigned long)_RET_IP_);
 	r = ll_pthread_rwlock_trywrlock(rwlock);
 	if (r)
-                lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
+		lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
 
 	return r;
 }
@@ -397,7 +397,7 @@ int pthread_rwlock_wrlock(pthread_rwlock_t *rwlock)
 	lock_acquire(&__get_lock(rwlock)->dep_map, 0, 0, 0, 1, NULL, (unsigned long)_RET_IP_);
 	r = ll_pthread_rwlock_wrlock(rwlock);
 	if (r)
-		lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
+		lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
 
 	return r;
 }
@@ -408,7 +408,7 @@ int pthread_rwlock_unlock(pthread_rwlock_t *rwlock)
 
         init_preload();
 
-	lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
+	lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
 	r = ll_pthread_rwlock_unlock(rwlock);
 	if (r)
 		lock_acquire(&__get_lock(rwlock)->dep_map, 0, 0, 0, 1, NULL, (unsigned long)_RET_IP_);