[PATCH cgroup/for-3.12] cgroup: make css_for_each_descendant() andfriends include the origin css in the iteration

[Tejun Heo]

Hello,

I've been wanting to do this for some time and given all the recent
API updates now seems like a pretty good opportunity.  Verified
freezer and blkcg.  The conversions are mostly straight forward but
I'd much appreciate acks from controller maintainers.

The patch is on top of

  cgroup/for-3.12 61584e3f4 ("cgroup: Merge branch 'for-3.11-fixes' into for-3.12")
+ [1] cgroup: use cgroup_subsys_state as the primary subsystem interface handle
+ [2] cgroup: make cgroup_event specific to memcg

and available in the following git branch.

 git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-descendant-update

Thanks.

[1] https://lkml.org/lkml/2013/8/1/722
[2] http://thread.gmane.org/gmane.linux.kernel.cgroups/8726

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