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authorAndi Kleen <ak@suse.de>2007-07-22 05:12:40 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-22 14:03:38 -0400
commite05aff854c9f348629bb66c191eee87e4d002900 (patch)
tree11913da94cce3ac1bc478f1d2916dd573f56fac5 /include/asm-i386/cmpxchg.h
parent57c22f49e4c7d27a03e109a317c30b12f1bae0b2 (diff)
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>
Diffstat (limited to 'include/asm-i386/cmpxchg.h')
-rw-r--r--include/asm-i386/cmpxchg.h2
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,
34 "\n1:\t" 34 "\n1:\t"
35 "movl (%0), %%eax\n\t" 35 "movl (%0), %%eax\n\t"
36 "movl 4(%0), %%edx\n\t" 36 "movl 4(%0), %%edx\n\t"
37 "lock cmpxchg8b (%0)\n\t" 37 LOCK_PREFIX "cmpxchg8b (%0)\n\t"
38 "jnz 1b" 38 "jnz 1b"
39 : /* no outputs */ 39 : /* no outputs */
40 : "D"(ptr), 40 : "D"(ptr),