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| author | Alexander Duyck <alexander.h.duyck@redhat.com> | 2014-12-11 15:01:55 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-12-11 21:15:05 -0500 |
| commit | 8a449718414ff10b9d5559ed3e8e09c7178774f2 (patch) | |
| tree | 81097c0d6949fb90e40176ddff1f4be30467b576 /arch/sparc | |
| parent | c11a9009ae6a8c42a8cd69d885601e1aa6fbea04 (diff) | |
| download | linux-8a449718414ff10b9d5559ed3e8e09c7178774f2.tar.gz | |
arch: Cleanup read_barrier_depends() and comments
This patch is meant to cleanup the handling of read_barrier_depends and
smp_read_barrier_depends. In multiple spots in the kernel headers
read_barrier_depends is defined as "do {} while (0)", however we then go
into the SMP vs non-SMP sections and have the SMP version reference
read_barrier_depends, and the non-SMP define it as yet another empty
do/while.
With this commit I went through and cleaned out the duplicate definitions
and reduced the number of definitions down to 2 per header. In addition I
moved the 50 line comments for the macro from the x86 and mips headers that
defined it as an empty do/while to those that were actually defining the
macro, alpha and blackfin.
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
| -rw-r--r-- | arch/sparc/include/asm/barrier_64.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/sparc/include/asm/barrier_64.h b/arch/sparc/include/asm/barrier_64.h index 305dcc3dc721..6c974c0977ad 100644 --- a/arch/sparc/include/asm/barrier_64.h +++ b/arch/sparc/include/asm/barrier_64.h @@ -37,7 +37,6 @@ do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \ #define rmb() __asm__ __volatile__("":::"memory") #define wmb() __asm__ __volatile__("":::"memory") -#define read_barrier_depends() do { } while(0) #define set_mb(__var, __value) \ do { __var = __value; membar_safe("#StoreLoad"); } while(0) @@ -51,7 +50,8 @@ do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \ #define smp_wmb() __asm__ __volatile__("":::"memory") #endif -#define smp_read_barrier_depends() do { } while(0) +#define read_barrier_depends() do { } while (0) +#define smp_read_barrier_depends() do { } while (0) #define smp_store_release(p, v) \ do { \ |