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>
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 02e4f20..8008522 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -899,12 +899,6 @@
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);
