diff --git a/[refs] b/[refs]
index 1789d0995f17..1714761bd306 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8efcbab674de2bee45a2e4cdf97de16b8e609ac8
+refs/heads/master: 56397f8dadb40055479a8ffff23f21a890098a31
diff --git a/trunk/arch/x86/xen/smp.c b/trunk/arch/x86/xen/smp.c
index f702199312a5..a8ebafc09d47 100644
--- a/trunk/arch/x86/xen/smp.c
+++ b/trunk/arch/x86/xen/smp.c
@@ -430,4 +430,5 @@ void __init xen_smp_init(void)
 {
 	smp_ops = xen_smp_ops;
 	xen_fill_possible_map();
+	paravirt_use_bytelocks();
 }