tree 1093306a5eabc7716fa7659c2ee48b99bc984c2f
parent efeb77b2f13deb0503e65ad2b243495b6de75173
author Tejun Heo <tj@kernel.org> 1357577467 -0800
committer Tejun Heo <tj@kernel.org> 1357577467 -0800

cpuset: introduce cpuset_for_each_child()

Instead of iterating cgroup->children directly, introduce and use
cpuset_for_each_child() which wraps cgroup_for_each_child() and
performs online check.  As it uses the generic iterator, it requires
RCU read locking too.

As cpuset is currently protected by cgroup_mutex, non-online cpusets
aren't visible to all the iterations and this patch currently doesn't
make any functional difference.  This will be used to de-couple cpuset
locking from cgroup core.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>