net: Simplify vlan pernet operations.

Take advantage of the new pernet automatic storage management,
and stop using compatibility network namespace functions.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/8021q/vlan.c

@@ -686,47 +686,28 @@ static int vlan_ioctl_handler(struct net *net, void __user *arg)
 
 static int vlan_init_net(struct net *net)
 {
+	struct vlan_net *vn = net_generic(net, vlan_net_id);
 	int err;
-	struct vlan_net *vn;
-
-	err = -ENOMEM;
-	vn = kzalloc(sizeof(struct vlan_net), GFP_KERNEL);
-	if (vn == NULL)
-		goto err_alloc;
-
-	err = net_assign_generic(net, vlan_net_id, vn);
-	if (err < 0)
-		goto err_assign;
 
 	vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
 
 	err = vlan_proc_init(net);
-	if (err < 0)
-		goto err_proc;
 
-	return 0;
-
-err_proc:
-	/* nothing */
-err_assign:
-	kfree(vn);
-err_alloc:
 	return err;
 }
 
 static void vlan_exit_net(struct net *net)
 {
-	struct vlan_net *vn;
-
-	vn = net_generic(net, vlan_net_id);
 	rtnl_kill_links(net, &vlan_link_ops);
+
 	vlan_proc_cleanup(net);
-	kfree(vn);
 }
 
 static struct pernet_operations vlan_net_ops = {
 	.init = vlan_init_net,
 	.exit = vlan_exit_net,
+	.id   = &vlan_net_id,
+	.size = sizeof(struct vlan_net),
 };
 
 static int __init vlan_proto_init(void)
@@ -736,7 +717,7 @@ static int __init vlan_proto_init(void)
 	pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright);
 	pr_info("All bugs added by %s\n", vlan_buggyright);
 
-	err = register_pernet_gen_device(&vlan_net_id, &vlan_net_ops);
+	err = register_pernet_device(&vlan_net_ops);
 	if (err < 0)
 		goto err0;
 
@@ -761,7 +742,7 @@ static int __init vlan_proto_init(void)
 err3:
 	unregister_netdevice_notifier(&vlan_notifier_block);
 err2:
-	unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops);
+	unregister_pernet_device(&vlan_net_ops);
 err0:
 	return err;
 }
@@ -781,7 +762,7 @@ static void __exit vlan_cleanup_module(void)
 	for (i = 0; i < VLAN_GRP_HASH_SIZE; i++)
 		BUG_ON(!hlist_empty(&vlan_group_hash[i]));
 
-	unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops);
+	unregister_pernet_device(&vlan_net_ops);
 	rcu_barrier(); /* Wait for completion of call_rcu()'s */
 
 	vlan_gvrp_uninit();