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由 Tejun Heo 提交于
After the recent cgroup_kn_lock_live() changes, cgroup_mutex is no longer nested below kernfs active protection. The two don't have any relationship now. This patch nests kernfs active protection under cgroup_mutex. All cftype operations now require both cgroup_tree_mutex and cgroup_mutex, temporary cgroup_mutex releases over kernfs operations are removed, and cgroup_add/rm_cftypes() grab both mutexes. This makes cgroup_tree_mutex redundant, which will be removed by the next patch. Signed-off-by: NTejun Heo <tj@kernel.org> Acked-by: NLi Zefan <lizefan@huawei.com>
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