diff options
| author | Roman Zippel | 2006-10-06 00:43:56 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2006-10-06 08:53:41 -0700 |
| commit | 9ef308946fa8390136130a886b0d9a57867a747a (patch) | |
| tree | f6a14e8639ae5b749a530fd2ce92ee66d9e69072 | |
| parent | 6c04c28a656c1717fbe617efc40edabca3a85ca3 (diff) | |
[PATCH] m68k: small system.h cleanup
avoid unnecessary xchg() use in set_mb()
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/asm-m68k/system.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/asm-m68k/system.h b/include/asm-m68k/system.h index 131a0cb0f491..243dd13e6bfc 100644 --- a/include/asm-m68k/system.h +++ b/include/asm-m68k/system.h @@ -78,13 +78,13 @@ static inline int irqs_disabled(void) #define mb() barrier() #define rmb() barrier() #define wmb() barrier() -#define read_barrier_depends() do { } while(0) -#define set_mb(var, value) do { xchg(&var, value); } while (0) +#define read_barrier_depends() ((void)0) +#define set_mb(var, value) ({ (var) = (value); wmb(); }) #define smp_mb() barrier() #define smp_rmb() barrier() #define smp_wmb() barrier() -#define smp_read_barrier_depends() do { } while(0) +#define smp_read_barrier_depends() ((void)0) #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) |