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>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/asm-i386/cmpxchg.h b/include/asm-i386/cmpxchg.h
index 64dcdf46117b..f86ede28f6dc 100644
--- a/include/asm-i386/cmpxchg.h
+++ b/include/asm-i386/cmpxchg.h
@@ -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),