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cgroup: short-circuit current_cgns_cgroup_from_root() on the default hierarchy

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Like commit 13d82fb77a ("cgroup: short-circuit cset_cgroup_from_root() on
the default hierarchy"), short-circuit current_cgns_cgroup_from_root() on
the default hierarchy.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Miaohe Lin 2019-09-29 16:06:58 +08:00 committed by Tejun Heo
parent da0c9ea146
commit 61e867fde2
1 changed files with 2 additions and 0 deletions
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2
kernel/cgroup/cgroup.c
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@ -1374,6 +1374,8 @@ current_cgns_cgroup_from_root(struct cgroup_root *root)
cset = current->nsproxy->cgroup_ns->root_cset;
if (cset == &init_css_set) {
res = &root->cgrp;
} else if (root == &cgrp_dfl_root) {
res = cset->dfl_cgrp;
} else {
struct cgrp_cset_link *link;