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-alpha/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-alpha/atomic.h')
-rw-r--r-- | include/asm-alpha/atomic.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-alpha/atomic.h b/include/asm-alpha/atomic.h index 20ac3d95ecd9..a6660809a879 100644 --- a/include/asm-alpha/atomic.h +++ b/include/asm-alpha/atomic.h | |||
@@ -177,6 +177,8 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t * v) | |||
177 | return result; | 177 | return result; |
178 | } | 178 | } |
179 | 179 | ||
180 | #define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n))) | ||
181 | |||
180 | #define atomic_dec_return(v) atomic_sub_return(1,(v)) | 182 | #define atomic_dec_return(v) atomic_sub_return(1,(v)) |
181 | #define atomic64_dec_return(v) atomic64_sub_return(1,(v)) | 183 | #define atomic64_dec_return(v) atomic64_sub_return(1,(v)) |
182 | 184 | ||