From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 14 Jul 2013 13:50:23 +0000 (+0400)
Subject: cgroup: we can use simple_lookup() now
X-Git-Tag: firefly_0821_release~176^2~5689^2~1
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=786e1448d9c5d2a469bcc9d2aecacd418ee1aca0;p=firefly-linux-kernel-4.4.55.git

cgroup: we can use simple_lookup() now

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index e5583d10a325..0e0b20b8c5db 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -802,7 +802,6 @@ static struct cgroup *task_cgroup_from_root(struct task_struct *task,
  */
 
 static int cgroup_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
-static struct dentry *cgroup_lookup(struct inode *, struct dentry *, unsigned int);
 static int cgroup_rmdir(struct inode *unused_dir, struct dentry *dentry);
 static int cgroup_populate_dir(struct cgroup *cgrp, bool base_files,
 			       unsigned long subsys_mask);
@@ -2642,7 +2641,7 @@ static const struct inode_operations cgroup_file_inode_operations = {
 };
 
 static const struct inode_operations cgroup_dir_inode_operations = {
-	.lookup = cgroup_lookup,
+	.lookup = simple_lookup,
 	.mkdir = cgroup_mkdir,
 	.rmdir = cgroup_rmdir,
 	.rename = cgroup_rename,
@@ -2652,14 +2651,6 @@ static const struct inode_operations cgroup_dir_inode_operations = {
 	.removexattr = cgroup_removexattr,
 };
 
-static struct dentry *cgroup_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
-{
-	if (dentry->d_name.len > NAME_MAX)
-		return ERR_PTR(-ENAMETOOLONG);
-	d_add(dentry, NULL);
-	return NULL;
-}
-
 /*
  * Check if a file is a control file
  */