diff --git a/[refs] b/[refs]
index 1645b6328eab..38e1bfdba7e3 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8f37ada5b5f6bfb4d251a7f510f249cb855b77b3
+refs/heads/master: c839d30a41dd92eb32d7fcfa2b4e99042fc64bf2
diff --git a/trunk/include/net/tcp.h b/trunk/include/net/tcp.h
index 56f0aec40ed6..75be5a28815d 100644
--- a/trunk/include/net/tcp.h
+++ b/trunk/include/net/tcp.h
@@ -939,7 +939,7 @@ static inline int tcp_prequeue(struct sock *sk, struct sk_buff *skb)
 
 		tp->ucopy.memory = 0;
 	} else if (skb_queue_len(&tp->ucopy.prequeue) == 1) {
-		wake_up_interruptible_poll(sk->sk_sleep,
+		wake_up_interruptible_sync_poll(sk->sk_sleep,
 					   POLLIN | POLLRDNORM | POLLRDBAND);
 		if (!inet_csk_ack_scheduled(sk))
 			inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,