[PATCH] Support patchable lock prefix for pure assembly files

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

[PATCH] Support patchable lock prefix for pure assembly files
Signed-off-by: N Andi Kleen <ak@suse.de>
b4062b16 · Andi Kleen · Andi Kleen · 538b5b41 · b4062b16
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include/asm-x86_64/alternative-asm.i include/asm-x86_64/alternative-asm.i +14 -0

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--- a/include/asm-x86_64/alternative-asm.i
+++ b/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