[PATCH -next] appletalk: use remove_proc_subtree to simplify procfs code

[Yue Haibing]

From: YueHaibing <yuehaib...@huawei.com>

Use remove_proc_subtree to remove the whole subtree
on cleanup.Also do some cleanup.

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 net/appletalk/atalk_proc.c | 56 ++++++++++++++--------------------------------
 1 file changed, 17 insertions(+), 39 deletions(-)

diff --git a/net/appletalk/atalk_proc.c b/net/appletalk/atalk_proc.c
index 8006295..398b767 100644
--- a/net/appletalk/atalk_proc.c
+++ b/net/appletalk/atalk_proc.c
@@ -210,56 +210,34 @@ static const struct seq_operations atalk_seq_socket_ops = 
{
        .show   = atalk_seq_socket_show,
 };
 
-static struct proc_dir_entry *atalk_proc_dir;
-
 int __init atalk_proc_init(void)
 {
-       struct proc_dir_entry *p;
-       int rc = -ENOMEM;
+       if (!proc_mkdir("atalk", init_net.proc_net))
+               return -ENOMEM;
 
-       atalk_proc_dir = proc_mkdir("atalk", init_net.proc_net);
-       if (!atalk_proc_dir)
+       if (!proc_create_seq("atalk/interface", 0444, init_net.proc_net,
+                           &atalk_seq_interface_ops));
                goto out;
 
-       p = proc_create_seq("interface", 0444, atalk_proc_dir,
-                       &atalk_seq_interface_ops);
-       if (!p)
-               goto out_interface;
-
-       p = proc_create_seq("route", 0444, atalk_proc_dir,
-                       &atalk_seq_route_ops);
-       if (!p)
-               goto out_route;
+       if (!proc_create_seq("atalk/route", 0444, init_net.proc_net,
+                           &atalk_seq_route_ops));
+               goto out;
 
-       p = proc_create_seq("socket", 0444, atalk_proc_dir,
-                       &atalk_seq_socket_ops);
-       if (!p)
-               goto out_socket;
+       if (!proc_create_seq("atalk/socket", 0444, init_net.proc_net,
+                           &atalk_seq_socket_ops));
+               goto out;
 
-       p = proc_create_seq_private("arp", 0444, atalk_proc_dir, &aarp_seq_ops,
-                       sizeof(struct aarp_iter_state), NULL);
-       if (!p)
-               goto out_arp;
+       if (!proc_create_seq_private("atalk/arp", 0444, init_net.proc_net,
+                                    &aarp_seq_ops,
+                                    sizeof(struct aarp_iter_state), NULL));
+               goto out;
 
-       rc = 0;
 out:
-       return rc;
-out_arp:
-       remove_proc_entry("socket", atalk_proc_dir);
-out_socket:
-       remove_proc_entry("route", atalk_proc_dir);
-out_route:
-       remove_proc_entry("interface", atalk_proc_dir);
-out_interface:
-       remove_proc_entry("atalk", init_net.proc_net);
-       goto out;
+       remove_proc_subtree("atalk", init_net.proc_net);
+       return -ENOMEM;
 }
 
 void __exit atalk_proc_exit(void)
 {
-       remove_proc_entry("interface", atalk_proc_dir);
-       remove_proc_entry("route", atalk_proc_dir);
-       remove_proc_entry("socket", atalk_proc_dir);
-       remove_proc_entry("arp", atalk_proc_dir);
-       remove_proc_entry("atalk", init_net.proc_net);
+       remove_proc_subtree("atalk", init_net.proc_net);
 }
-- 
2.7.0