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authorNick Piggin <nickpiggin@yahoo.com.au>2005-11-13 19:07:24 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-13 21:14:16 -0500
commit4a6dae6d382e9edf3ff440b819e554ed706359bc (patch)
tree2945a5095973e2ecf05b503d6deb859083045b8e /include/asm-ia64/atomic.h
parent53e86b91b7ae66d4c2757195cbd42e00d9199cf2 (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-ia64/atomic.h')
-rw-r--r--include/asm-ia64/atomic.h2
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)
88 return new; 88 return new;
89} 89}
90 90
91#define atomic_cmpxchg(v, old, new) ((int)cmpxchg(&((v)->counter), old, new))
92
91#define atomic_add_return(i,v) \ 93#define atomic_add_return(i,v) \
92({ \ 94({ \
93 int __ia64_aar_i = (i); \ 95 int __ia64_aar_i = (i); \