diff --git a/[refs] b/[refs]
index c4ad08e00a06..cd1226efb5de 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f49c57e141c7f53353e4265a31dc2324e6215037
+refs/heads/master: 71c5c1595c04852d6fbf3c4882b47b30b61a4d32
diff --git a/trunk/include/linux/socket.h b/trunk/include/linux/socket.h
index 7b3aae2052a6..354cc5617f8b 100644
--- a/trunk/include/linux/socket.h
+++ b/trunk/include/linux/socket.h
@@ -255,6 +255,7 @@ struct ucred {
 #define MSG_ERRQUEUE	0x2000	/* Fetch message from error queue */
 #define MSG_NOSIGNAL	0x4000	/* Do not generate SIGPIPE */
 #define MSG_MORE	0x8000	/* Sender will send more */
+#define MSG_WAITFORONE	0x10000	/* recvmmsg(): block until 1+ packets avail */
 
 #define MSG_EOF         MSG_FIN
 
diff --git a/trunk/net/socket.c b/trunk/net/socket.c
index 769c386bd428..f55ffe9f8c87 100644
--- a/trunk/net/socket.c
+++ b/trunk/net/socket.c
@@ -2135,6 +2135,10 @@ int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
 			break;
 		++datagrams;
 
+		/* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */
+		if (flags & MSG_WAITFORONE)
+			flags |= MSG_DONTWAIT;
+
 		if (timeout) {
 			ktime_get_ts(timeout);
 			*timeout = timespec_sub(end_time, *timeout);