cpuset: a bit cleanup for scan_for_empty_cpusets()
clean up hierarchy traversal code Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Paul Menage <menage@google.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Paul Jackson <pj@sgi.com> Cc: Cliff Wickman <cpw@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -1833,24 +1833,21 @@ static void remove_tasks_in_empty_cpuset(struct cpuset *cs)
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*/
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static void scan_for_empty_cpusets(const struct cpuset *root)
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{
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LIST_HEAD(queue);
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struct cpuset *cp; /* scans cpusets being updated */
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struct cpuset *child; /* scans child cpusets of cp */
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struct list_head queue;
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struct cgroup *cont;
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nodemask_t oldmems;
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INIT_LIST_HEAD(&queue);
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list_add_tail((struct list_head *)&root->stack_list, &queue);
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while (!list_empty(&queue)) {
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cp = container_of(queue.next, struct cpuset, stack_list);
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cp = list_first_entry(&queue, struct cpuset, stack_list);
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list_del(queue.next);
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list_for_each_entry(cont, &cp->css.cgroup->children, sibling) {
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child = cgroup_cs(cont);
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list_add_tail(&child->stack_list, &queue);
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}
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cont = cp->css.cgroup;
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/* Continue past cpusets with all cpus, mems online */
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if (cpus_subset(cp->cpus_allowed, cpu_online_map) &&
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