netns xfrm: dst garbage-collecting in netns

Pass netns pointer to struct xfrm_policy_afinfo::garbage_collect()

	[This needs more thoughts on what to do with dst_ops]
	[Currently stub to init_net]

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 49e0898..7ebbdd6 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2173,9 +2173,9 @@
 	return !atomic_read(&dst->__refcnt);
 }
 
-static void __xfrm_garbage_collect(void)
+static void __xfrm_garbage_collect(struct net *net)
 {
-	xfrm_prune_bundles(&init_net, unused_bundle);
+	xfrm_prune_bundles(net, unused_bundle);
 }
 
 static int xfrm_flush_bundles(struct net *net)