Commit 091b76d6 authored by Greg Ungerer's avatar Greg Ungerer Committed by Linus Torvalds
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m68knommu: avoid unneccessary use of xchg() in set_mb() 



Avoid unneccessary use of xchg() in set_mb().

Signed-off-by: default avatarGreg Ungerer <gerg@uclinux.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 903be1c5

include/asm-m68knommu/system.h

+1 −1
Original line number Diff line number Diff line
@@ -104,7 +104,7 @@ asmlinkage void resume(void); 
#define mb()   asm volatile (""   : : :"memory")

#define rmb()  asm volatile (""   : : :"memory")

#define wmb()  asm volatile (""   : : :"memory")

#define set_mb(var, value) do { xchg(&var, value); } while (0)

#define set_mb(var, value)	({ (var) = (value); wmb(); })



#ifdef CONFIG_SMP

#define smp_mb()	mb()