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-rw-r--r--include/asm-x86_64/alternative-asm.i14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/asm-x86_64/alternative-asm.i b/include/asm-x86_64/alternative-asm.i
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index 000000000000..e4041f4fa4dc
--- /dev/null
+++ b/include/asm-x86_64/alternative-asm.i
@@ -0,0 +1,14 @@
+#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