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Li Zefan authored
This enables us to lookup a cgroup by its id. v4: - add a comment for idr_remove() in cgroup_offline_fn(). v3: - on success, idr_alloc() returns the id but not 0, so fix the BUG_ON() in cgroup_init(). - pass the right value to idr_alloc() so that the id for dummy cgroup is 0. Signed-off-by:
Li Zefan <lizefan@huawei.com> Reviewed-by:
Michal Hocko <mhocko@suse.cz> Signed-off-by:
Tejun Heo <tj@kernel.org>
4e96ee8e