diff options
author | Roman Zippel <zippel@linux-m68k.org> | 2006-10-06 03:43:56 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-06 11:53:41 -0400 |
commit | 9ef308946fa8390136130a886b0d9a57867a747a (patch) | |
tree | f6a14e8639ae5b749a530fd2ce92ee66d9e69072 /include | |
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>
Diffstat (limited to 'include')
-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) | |||
78 | #define mb() barrier() | 78 | #define mb() barrier() |
79 | #define rmb() barrier() | 79 | #define rmb() barrier() |
80 | #define wmb() barrier() | 80 | #define wmb() barrier() |
81 | #define read_barrier_depends() do { } while(0) | 81 | #define read_barrier_depends() ((void)0) |
82 | #define set_mb(var, value) do { xchg(&var, value); } while (0) | 82 | #define set_mb(var, value) ({ (var) = (value); wmb(); }) |
83 | 83 | ||
84 | #define smp_mb() barrier() | 84 | #define smp_mb() barrier() |
85 | #define smp_rmb() barrier() | 85 | #define smp_rmb() barrier() |
86 | #define smp_wmb() barrier() | 86 | #define smp_wmb() barrier() |
87 | #define smp_read_barrier_depends() do { } while(0) | 87 | #define smp_read_barrier_depends() ((void)0) |
88 | 88 | ||
89 | 89 | ||
90 | #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) | 90 | #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) |