cpuset: remove fast exit path from remove_tasks_in_empty_cpuset()
The function isn't that hot, the overhead of missing the fast exit is low, the test itself depends heavily on cgroup internals, and it's gonna be a hindrance when trying to decouple cpuset locking from cgroup core. Remove the fast exit path. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Li Zefan <lizefan@huawei.com>
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@ -1967,14 +1967,6 @@ static void remove_tasks_in_empty_cpuset(struct cpuset *cs)
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{
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{
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struct cpuset *parent;
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struct cpuset *parent;
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/*
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* The cgroup's css_sets list is in use if there are tasks
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* in the cpuset; the list is empty if there are none;
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* the cs->css.refcnt seems always 0.
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*/
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if (list_empty(&cs->css.cgroup->css_sets))
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return;
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/*
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/*
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* Find its next-highest non-empty parent, (top cpuset
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* Find its next-highest non-empty parent, (top cpuset
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* has online cpus, so can't be empty).
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* has online cpus, so can't be empty).
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