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cgroup: remove cgroup->control_kn

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Now that cgroup_subtree_control_write() has access to the associated
kernfs_open_file and thus the kernfs_node, there's no need to cache it
in cgroup->control_kn on creation.  Remove cgroup->control_kn and use
@of->kn directly.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
This commit is contained in:
Tejun Heo 2014-05-13 12:16:22 -04:00
parent acbef755f4
commit b7fc5ad235
2 changed files with 3 additions and 6 deletions
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1
include/linux/cgroup.h
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@ -177,7 +177,6 @@ struct cgroup {
struct cgroup *parent; /* my parent */
struct kernfs_node *kn; /* cgroup kernfs entry */
struct kernfs_node *control_kn; /* kn for "cgroup.subtree_control" */
struct kernfs_node *populated_kn; /* kn for "cgroup.subtree_populated" */
/*