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| author | Nick Piggin <nickpiggin@yahoo.com.au> | 2005-11-13 16:07:24 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-13 18:14:16 -0800 |
| commit | 4a6dae6d382e9edf3ff440b819e554ed706359bc (patch) | |
| tree | 2945a5095973e2ecf05b503d6deb859083045b8e /include/asm-ia64/atomic.h | |
| parent | 53e86b91b7ae66d4c2757195cbd42e00d9199cf2 (diff) | |
| download | linux-4a6dae6d382e9edf3ff440b819e554ed706359bc.tar.gz linux-4a6dae6d382e9edf3ff440b819e554ed706359bc.tar.bz2 linux-4a6dae6d382e9edf3ff440b819e554ed706359bc.zip | |
[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-ia64/atomic.h')
| -rw-r--r-- | include/asm-ia64/atomic.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-ia64/atomic.h b/include/asm-ia64/atomic.h index 874a6f890e75..593d3da9f3c2 100644 --- a/include/asm-ia64/atomic.h +++ b/include/asm-ia64/atomic.h @@ -88,6 +88,8 @@ ia64_atomic64_sub (__s64 i, atomic64_t *v) return new; } +#define atomic_cmpxchg(v, old, new) ((int)cmpxchg(&((v)->counter), old, new)) + #define atomic_add_return(i,v) \ ({ \ int __ia64_aar_i = (i); \ |