[NET]: Make core networking code use seq_open_private

This concerns the ipv4 and ipv6 code mostly, but also the netlink
and unix sockets.

The netlink code is an example of how to use the __seq_open_private()
call - it saves the net namespace on this private.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 11 deletions

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 3ef32825da71..f934f54fbfd5 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1845,27 +1845,18 @@ static const struct seq_operations netlink_seq_ops = {
 
 static int netlink_seq_open(struct inode *inode, struct file *file)
 {
-        struct seq_file *seq;
         struct nl_seq_iter *iter;
-        int err;
 
-        iter = kzalloc(sizeof(*iter), GFP_KERNEL);
+        iter = __seq_open_private(file, &netlink_seq_ops, sizeof(*iter));
         if (!iter)
                 return -ENOMEM;
 
-        err = seq_open(file, &netlink_seq_ops);
-        if (err) {
-                kfree(iter);
-                return err;
-        }
-
-        seq = file->private_data;
-        seq->private = iter;
         iter->net = get_proc_net(inode);
         if (!iter->net) {
                 seq_release_private(inode, file);
                 return -ENXIO;
         }
+
         return 0;
 }