[PATCH] Support patchable lock prefix for pure assembly files

Signed-off-by: Andi Kleen <ak@suse.de>

include/asm-x86_64/alternative-asm.i

+#include <linux/config.h>
+
+#ifdef CONFIG_SMP
+	.macro LOCK_PREFIX
+1:	lock
+	.section .smp_locks,"a"
+	.align 8
+	.quad 1b
+	.previous
+	.endm
+#else
+	.macro LOCK_PREFIX
+	.endm
+#endif