mISDN: use DECLARE_COMPLETION_ONSTACK for non-constant completion

The _ONSTACK variant should be used for on-stack completion,
otherwise it will break lockdep.
Signed-off-by: NYong Zhang <yong.zhang0@gmail.com>
Acked-by: NKarsten Keil <keil@b1-systems.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/isdn/mISDN/l1oip_core.c

@@ -661,7 +661,7 @@ l1oip_socket_thread(void *data)
 	size_t recvbuf_size = 1500;
 	int recvlen;
 	struct socket *socket = NULL;
-	DECLARE_COMPLETION(wait);
+	DECLARE_COMPLETION_ONSTACK(wait);
 
 	/* allocate buffer memory */
 	recvbuf = kmalloc(recvbuf_size, GFP_KERNEL);