[PATCH v2 6/6] cgroup: remove bogus comments in cgroup_diput()

[Li Zefan <lizefan@huawei.com>]

Since commit 48ddbe194623ae089cc0576e60363f2d2e85662a
("cgroup: make css->refcnt clearing on cgroup removal optional"),
each css holds a ref on cgroup's dentry, so cgroup_diput() won't be
called until all css' refs go down to 0, which invalids the comments.

Signed-off-by: Li Zefan <lizefan@huawei.com>
---
 kernel/cgroup.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index f18b0d9..368cff1 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -899,12 +899,6 @@ static void cgroup_diput(struct dentry *dentry, struct inode *inode)
 		struct cgroup *cgrp = dentry->d_fsdata;
 
 		BUG_ON(!(cgroup_is_removed(cgrp)));
-		/* It's possible for external users to be holding css
-		 * reference counts on a cgroup; css_put() needs to
-		 * be able to access the cgroup after decrementing
-		 * the reference count in order to know if it needs to
-		 * queue the cgroup to be handled by the release
-		 * agent */
 		call_rcu(&cgrp->rcu_head, cgroup_free_rcu);
 	} else {
 		struct cfent *cfe = __d_cfe(dentry);
-- 
1.8.0.2