diff options
| author | Nick Piggin <nickpiggin@yahoo.com.au> | 2005-11-13 19:07:24 -0500 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-13 21:14:16 -0500 |
| commit | 4a6dae6d382e9edf3ff440b819e554ed706359bc (patch) | |
| tree | 2945a5095973e2ecf05b503d6deb859083045b8e /include/asm-m68k | |
| parent | 53e86b91b7ae66d4c2757195cbd42e00d9199cf2 (diff) | |
[PATCH] atomic: cmpxchg
Introduce an atomic_cmpxchg operation.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-m68k')
| -rw-r--r-- | include/asm-m68k/atomic.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-m68k/atomic.h b/include/asm-m68k/atomic.h index 38f3043e7fe1..b821975a361a 100644 --- a/include/asm-m68k/atomic.h +++ b/include/asm-m68k/atomic.h | |||
| @@ -139,6 +139,8 @@ static inline void atomic_set_mask(unsigned long mask, unsigned long *v) | |||
| 139 | __asm__ __volatile__("orl %1,%0" : "+m" (*v) : "id" (mask)); | 139 | __asm__ __volatile__("orl %1,%0" : "+m" (*v) : "id" (mask)); |
| 140 | } | 140 | } |
| 141 | 141 | ||
| 142 | #define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n))) | ||
| 143 | |||
| 142 | /* Atomic operations are already serializing */ | 144 | /* Atomic operations are already serializing */ |
| 143 | #define smp_mb__before_atomic_dec() barrier() | 145 | #define smp_mb__before_atomic_dec() barrier() |
| 144 | #define smp_mb__after_atomic_dec() barrier() | 146 | #define smp_mb__after_atomic_dec() barrier() |