[PATCH] [11/11] 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 <[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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---

• References:
  • [PATCH] [0/11] Some more x86 patches for review
    • From: Andi Kleen <[email protected]>

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