cgroup: remove bogus comments in cgroup_diput()

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>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 0 insertions, 6 deletions

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 02e4f201472e..800852282c21 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);