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-xtensa/atomic.h | |
| 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-xtensa/atomic.h')
| -rw-r--r-- | include/asm-xtensa/atomic.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-xtensa/atomic.h b/include/asm-xtensa/atomic.h index 12b5732dc6e5..cd40c5e75160 100644 --- a/include/asm-xtensa/atomic.h +++ b/include/asm-xtensa/atomic.h | |||
| @@ -223,6 +223,7 @@ static inline int atomic_sub_return(int i, atomic_t * v) | |||
| 223 | */ | 223 | */ |
| 224 | #define atomic_add_negative(i,v) (atomic_add_return((i),(v)) < 0) | 224 | #define atomic_add_negative(i,v) (atomic_add_return((i),(v)) < 0) |
| 225 | 225 | ||
| 226 | #define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n))) | ||
| 226 | 227 | ||
| 227 | static inline void atomic_clear_mask(unsigned int mask, atomic_t *v) | 228 | static inline void atomic_clear_mask(unsigned int mask, atomic_t *v) |
| 228 | { | 229 | { |