[patch 01/15] Generic Mutex Subsystem, add-atomic-xchg-i386.patch

[Ingo Molnar <mingo@elte.hu>]

add atomic_cmpxchg() to i386. Needed by the new mutex code.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

----

 include/asm-i386/atomic.h |    1 +
 1 files changed, 1 insertion(+)

Index: linux/include/asm-i386/atomic.h
===================================================================
--- linux.orig/include/asm-i386/atomic.h
+++ linux/include/asm-i386/atomic.h
@@ -216,6 +216,7 @@ static __inline__ int atomic_sub_return(
 }
 
 #define atomic_cmpxchg(v, old, new) ((int)cmpxchg(&((v)->counter), old, new))
+#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
 
 /**
  * atomic_add_unless - add unless the number is a given value
-
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