new helper: file_inode(file)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index fe72cd0..75df0d7 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -163,7 +163,7 @@
 	struct net *net;
 
 	ret = -EINVAL;
-	net = get_proc_task_net(filp->f_path.dentry->d_inode);
+	net = get_proc_task_net(file_inode(filp));
 	if (net != NULL) {
 		ret = proc_readdir_de(net->proc_net, filp, dirent, filldir);
 		put_net(net);