diff --git a/[refs] b/[refs]
index 9bc4b0b334e2..b9a2692afa9d 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b3ac891b67bd4b1fc728d1c784cad1212dea433d
+refs/heads/master: 9c76b38476b18c45f97098a10b0176b321eba3ea
diff --git a/trunk/arch/x86/include/asm/cmpxchg_32.h b/trunk/arch/x86/include/asm/cmpxchg_32.h
index ffb9bb6b6c37..8859e12dd3cf 100644
--- a/trunk/arch/x86/include/asm/cmpxchg_32.h
+++ b/trunk/arch/x86/include/asm/cmpxchg_32.h
@@ -271,7 +271,8 @@ extern unsigned long long cmpxchg_486_u64(volatile void *, u64, u64);
 	__typeof__(*(ptr)) __ret;				\
 	__typeof__(*(ptr)) __old = (o);				\
 	__typeof__(*(ptr)) __new = (n);				\
-	alternative_io("call cmpxchg8b_emu",			\
+	alternative_io(LOCK_PREFIX_HERE				\
+			"call cmpxchg8b_emu",			\
 			"lock; cmpxchg8b (%%esi)" ,		\
 		       X86_FEATURE_CX8,				\
 		       "=A" (__ret),				\