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cgroup/rstat: check updated_next only for root
After commit dc26532 ("cgroup: rstat: punt root-level optimization to individual controllers"), each rstat on updated_children list has its ->updated_next not NULL. This means we can remove the check on ->updated_next, if we make sure the subtree from @root is on list, which could be done by checking updated_next for root. tj: Coding style fixes. Signed-off-by: Wei Yang <richard.weiyang@gmail.com> Reviewed-by: Michal Koutný <mkoutny@suse.com> Signed-off-by: Tejun Heo <tj@kernel.org>
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Wei Yang
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Tejun Heo
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Jan 6, 2022
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