fs: dlm: fix proper srcu api call

This patch will use call_srcu() instead of call_rcu() because the
related datastructure resource are handled under srcu context. I assume
the current code is fine anyway since free_conn() must be called when
the related resource are not in use otherwise. However it will correct
the overall handling in a srcu context.
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>

fs/dlm/lowcomms.c

@@ -1616,10 +1616,11 @@ static void free_conn(struct connection *con)
 	spin_unlock(&connections_lock);
 	if (con->othercon) {
 		clean_one_writequeue(con->othercon);
-		call_rcu(&con->othercon->rcu, connection_release);
+		call_srcu(&connections_srcu, &con->othercon->rcu,
+			  connection_release);
 	}
 	clean_one_writequeue(con);
-	call_rcu(&con->rcu, connection_release);
+	call_srcu(&connections_srcu, &con->rcu, connection_release);
 }
 
 static void work_flush(void)