dlm: use alloc_workqueue function

Replaces deprecated create_singlethread_workqueue().
Signed-off-by: David Teigland <teigland@redhat.com>

fs/dlm/lowcomms.c

@@ -1468,13 +1468,15 @@ static void work_stop(void)
 
 static int work_start(void)
 {
-	recv_workqueue = create_singlethread_workqueue("dlm_recv");
+	recv_workqueue = alloc_workqueue("dlm_recv",
+					 WQ_UNBOUND | WQ_MEM_RECLAIM, 1);
 	if (!recv_workqueue) {
 		log_print("can't start dlm_recv");
 		return -ENOMEM;
 	}
 
-	send_workqueue = create_singlethread_workqueue("dlm_send");
+	send_workqueue = alloc_workqueue("dlm_send",
+					 WQ_UNBOUND | WQ_MEM_RECLAIM, 1);
 	if (!send_workqueue) {
 		log_print("can't start dlm_send");
 		destroy_workqueue(recv_workqueue);