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authorIngo Molnar <mingo@elte.hu>2006-01-09 15:59:17 -0800
committerIngo Molnar <mingo@hera.kernel.org>2006-01-09 15:59:17 -0800
commitffbf670f5cd50501a34a5187981460da2216071e (patch)
treef2cd9eeeb59839d15feddf906310bb375474c573 /include/asm-sparc64/atomic.h
parentf17578decc40df8fceff82b106582e30bdfb3189 (diff)
downloadop-kernel-dev-ffbf670f5cd50501a34a5187981460da2216071e.zip
op-kernel-dev-ffbf670f5cd50501a34a5187981460da2216071e.tar.gz
[PATCH] mutex subsystem, add atomic_xchg() to all arches
add atomic_xchg() to all the architectures. Needed by the new mutex code. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Diffstat (limited to 'include/asm-sparc64/atomic.h')
-rw-r--r--include/asm-sparc64/atomic.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-sparc64/atomic.h b/include/asm-sparc64/atomic.h
index 11f5aa5..25256bd 100644
--- a/include/asm-sparc64/atomic.h
+++ b/include/asm-sparc64/atomic.h
@@ -72,6 +72,7 @@ extern int atomic64_sub_ret(int, atomic64_t *);
#define atomic64_add_negative(i, v) (atomic64_add_ret(i, v) < 0)
#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
+#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
#define atomic_add_unless(v, a, u) \
({ \
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