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-rw-r--r--include/asm-x86/alternative-asm_64.i12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/asm-x86/alternative-asm_64.i b/include/asm-x86/alternative-asm_64.i
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index 00000000000..0b3f1a2bb2c
--- /dev/null
+++ b/include/asm-x86/alternative-asm_64.i
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+#ifdef CONFIG_SMP
+ .macro LOCK_PREFIX
+1: lock
+ .section .smp_locks,"a"
+ .align 8
+ .quad 1b
+ .previous
+ .endm
+#else
+ .macro LOCK_PREFIX
+ .endm
+#endif