[NETNS][IPV6] route6 - add netns parameter to ip6_route_output

Add an netns parameter to ip6_route_output. That will allow to access
to the right routing table for outgoing traffic.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 4e19816..1e1ad1e 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -847,7 +847,7 @@
 	if ((dst = ip6_tnl_dst_check(t)) != NULL)
 		dst_hold(dst);
 	else {
-		dst = ip6_route_output(NULL, fl);
+		dst = ip6_route_output(&init_net, NULL, fl);
 
 		if (dst->error || xfrm_lookup(&dst, fl, NULL, 0) < 0)
 			goto tx_err_link_failure;