Previously lock was unconditionally used, but shouldn't be needed on
UP systems.
Signed-off-by: Andi Kleen <[email protected]>
Index: linux/include/asm-i386/cmpxchg.h
===================================================================
--- linux.orig/include/asm-i386/cmpxchg.h
+++ linux/include/asm-i386/cmpxchg.h
@@ -34,7 +34,7 @@ static inline void __set_64bit (unsigned
"\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),
-
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