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cgroup: remove cgrp->top_cgroup 

It's not used, and it can be retrieved via cgrp->root->top_cgroup.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Li Zefan 2013-04-15 14:25:05 +08:00 committed by Tejun Heo
parent 873fe09ea5
commit 05fb22ec54
2 changed files with 0 additions and 3 deletions
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1
include/linux/cgroup.h
View File

@ -204,7 +204,6 @@ struct cgroup {
struct cgroup_subsys_state *subsys[CGROUP_SUBSYS_COUNT];
struct cgroupfs_root *root;
struct cgroup *top_cgroup;
/*
* List of cg_cgroup_links pointing at css_sets with

2
kernel/cgroup.c
View File

@ -1418,7 +1418,6 @@ static void init_cgroup_root(struct cgroupfs_root *root)
root->number_of_cgroups = 1;
cgrp->root = root;
cgrp->name = &root_cgroup_name;
cgrp->top_cgroup = cgrp;
init_cgroup_housekeeping(cgrp);
list_add_tail(&cgrp->allcg_node, &root->allcg_list);
}
@ -4145,7 +4144,6 @@ static long cgroup_create(struct cgroup *parent, struct dentry *dentry,
cgrp->parent = parent;
cgrp->root = parent->root;
cgrp->top_cgroup = parent->top_cgroup;
if (notify_on_release(parent))
set_bit(CGRP_NOTIFY_ON_RELEASE, &cgrp->flags);