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i386: Use patchable lock prefix in set_64bit 

Previously lock was unconditionally used, but shouldn't be needed on
UP systems.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andi Kleen 2007-07-22 11:12:40 +02:00 committed by Linus Torvalds
parent 57c22f49e4
commit e05aff854c
1 changed files with 1 additions and 1 deletions
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2
include/asm-i386/cmpxchg.h
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@ -34,7 +34,7 @@ static inline void __set_64bit (unsigned long long * ptr,
"\n1:\t"
"movl (%0), %%eax\n\t"
"movl 4(%0), %%edx\n\t"
"lock cmpxchg8b (%0)\n\t"
LOCK_PREFIX "cmpxchg8b (%0)\n\t"
"jnz 1b"
: /* no outputs */
: "D"(ptr),