Commit e05aff85 authored by Andi Kleen's avatar Andi Kleen Committed by Linus Torvalds
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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: default avatarAndi Kleen <>
Signed-off-by: default avatarLinus Torvalds <>
parent 57c22f49
......@@ -34,7 +34,7 @@ static inline void __set_64bit (unsigned long long * ptr,
"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),
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