[PATCH] atomic: cmpxchg

[pandora-kernel.git] / include / asm-m68k / atomic.h

diff --git a/include/asm-m68k/atomic.h b/include/asm-m68k/atomic.h
index 38f3043..b821975 100644 (file)
--- a/include/asm-m68k/atomic.h
+++ b/include/asm-m68k/atomic.h
@@ -139,6 +139,8 @@ static inline void atomic_set_mask(unsigned long mask, unsigned long *v)
        __asm__ __volatile__("orl %1,%0" : "+m" (*v) : "id" (mask));
 }
 
+#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
+
 /* Atomic operations are already serializing */
 #define smp_mb__before_atomic_dec()    barrier()
 #define smp_mb__after_atomic_dec()     barrier()