diff --git a/[refs] b/[refs]
index f499bbb630a9..b915190db108 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 54481cf88bc59923ea30f2ca345a73c60155e901
+refs/heads/master: 46539383791a0e59a4af7412056dfbfc5240af0a
diff --git a/trunk/drivers/xen/events.c b/trunk/drivers/xen/events.c
index 4f0f22b020ea..76e5b7386af9 100644
--- a/trunk/drivers/xen/events.c
+++ b/trunk/drivers/xen/events.c
@@ -529,7 +529,7 @@ void xen_evtchn_do_upcall(struct pt_regs *regs)
 
 #ifndef CONFIG_X86 /* No need for a barrier -- XCHG is a barrier on x86. */
 		/* Clear master flag /before/ clearing selector flag. */
-		rmb();
+		wmb();
 #endif
 		pending_words = xchg(&vcpu_info->evtchn_pending_sel, 0);
 		while (pending_words != 0) {