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>

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>
Andi Kleen · Linus Torvalds
1 parent 57c22f49e4
Showing 1 changed file with 1 additions and 1 deletions Side-by-side Diff
include/asm-i386/cmpxchg.h
@@ -34,7 +34,7 @@
 		"\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),
...	...	@@ -34,7 +34,7 @@
34	34	"\n1:\t"
35	35	"movl (%0), %%eax\n\t"
36	36	"movl 4(%0), %%edx\n\t"
37		- "lock cmpxchg8b (%0)\n\t"
	37	+ LOCK_PREFIX "cmpxchg8b (%0)\n\t"
38	38	"jnz 1b"
39	39	: /* no outputs */
40	40	: "D"(ptr),