[NETNS]: Add namespace parameter to __ip_route_output_key.

This is only required to propagate it down to the
ip_route_output_slow.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 0576ff7..971ab02 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2443,7 +2443,8 @@
 out:	return err;
 }
 
-int __ip_route_output_key(struct rtable **rp, const struct flowi *flp)
+int __ip_route_output_key(struct net *net, struct rtable **rp,
+			  const struct flowi *flp)
 {
 	unsigned hash;
 	struct rtable *rth;
@@ -2470,7 +2471,7 @@
 	}
 	rcu_read_unlock_bh();
 
-	return ip_route_output_slow(&init_net, rp, flp);
+	return ip_route_output_slow(net, rp, flp);
 }
 
 EXPORT_SYMBOL_GPL(__ip_route_output_key);
@@ -2536,7 +2537,7 @@
 {
 	int err;
 
-	if ((err = __ip_route_output_key(rp, flp)) != 0)
+	if ((err = __ip_route_output_key(&init_net, rp, flp)) != 0)
 		return err;
 
 	if (flp->proto) {