[PATCH net] xfrm: remove the unnecessary .net_exit for xfrmi

[Xin Long]

The xfrm_if(s) on each netns can be deleted when its xfrmi dev is
deleted. xfrmi dev's removal can happen when:

  1. Its phydev is being deleted and NETDEV_UNREGISTER event is
     processed in xfrmi_event() from my last patch.
  2. netns is being removed and all xfrmi devs will be deleted.
  3. rtnl_link_unregister(&xfrmi_link_ops) in xfrmi_fini() when
     xfrm_interface.ko is being unloaded.

So there's no need to use xfrmi_exit_net() to clean any xfrm_if up.

Signed-off-by: Xin Long <lucien....@gmail.com>
---
 net/xfrm/xfrm_interface.c | 23 -----------------------
 1 file changed, 23 deletions(-)

diff --git a/net/xfrm/xfrm_interface.c b/net/xfrm/xfrm_interface.c
index f3de1f5..3420c71 100644
--- a/net/xfrm/xfrm_interface.c
+++ b/net/xfrm/xfrm_interface.c
@@ -738,30 +738,7 @@ static struct rtnl_link_ops xfrmi_link_ops __read_mostly = 
{
        .get_link_net   = xfrmi_get_link_net,
 };
 
-static void __net_exit xfrmi_destroy_interfaces(struct xfrmi_net *xfrmn)
-{
-       struct xfrm_if *xi;
-       LIST_HEAD(list);
-
-       xi = rtnl_dereference(xfrmn->xfrmi[0]);
-       if (!xi)
-               return;
-
-       unregister_netdevice_queue(xi->dev, &list);
-       unregister_netdevice_many(&list);
-}
-
-static void __net_exit xfrmi_exit_net(struct net *net)
-{
-       struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
-
-       rtnl_lock();
-       xfrmi_destroy_interfaces(xfrmn);
-       rtnl_unlock();
-}
-
 static struct pernet_operations xfrmi_net_ops = {
-       .exit = xfrmi_exit_net,
        .id   = &xfrmi_net_id,
        .size = sizeof(struct xfrmi_net),
 };
-- 
2.1.0