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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/metag | |
| 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/metag')
| -rw-r--r-- | arch/metag/include/asm/barrier.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/metag/include/asm/barrier.h b/arch/metag/include/asm/barrier.h index c7591e80067c..6d8b8c9b7c25 100644 --- a/arch/metag/include/asm/barrier.h +++ b/arch/metag/include/asm/barrier.h @@ -47,8 +47,6 @@ static inline void wmb(void) wr_fence(); } -#define read_barrier_depends() do { } while (0) - #ifndef CONFIG_SMP #define fence() do { } while (0) #define smp_mb() barrier() @@ -82,7 +80,10 @@ static inline void fence(void) #define smp_wmb() barrier() #endif #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 set_mb(var, value) do { var = value; smp_mb(); } while (0) #define smp_store_release(p, v) \ |