l2tp: small cleanup

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c
index 226a0ae..1c770c0 100644
--- a/net/l2tp/l2tp_ip.c
+++ b/net/l2tp/l2tp_ip.c
@@ -65,9 +65,7 @@
 			continue;
 
 		if ((l2tp->conn_id == tunnel_id) &&
-#ifdef CONFIG_NET_NS
-		    (sk->sk_net == net) &&
-#endif
+		    net_eq(sock_net(sk), net) &&
 		    !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) &&
 		    !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif))
 			goto found;