Generic Mutex Subsystem, add-atomic-xchg-i386.patch

PATCH In review Ingo Molnar 1 participant 1 message Dec 19, 2005 Atomic infrastructure

lore

Share & tools

lore

Ingo Molnar

author

2005-12-19 01:35 UTC #0 lore raw

PATCH 1/15 Generic Mutex Subsystem, add-atomic-xchg-i386.patch

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

Signed-off-by Ingo Molnar <[email protected]>

----

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

include/asm-i386/atomic.h +1 -0

Index: 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