Commits
Li Zefan committed bad34660344
cgroup: fix locking in cgroupstats_build() css_set_lock has been converted to css_set_rwsem, and rwsem can't nest inside rcu_read_lock. Signed-off-by: Li Zefan <lizefan@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org>