blkcg: add blkg_policy_data->plid
authorTejun Heo <tj@kernel.org>
Wed, 9 Jan 2013 16:05:12 +0000 (08:05 -0800)
committerTejun Heo <tj@kernel.org>
Wed, 9 Jan 2013 16:05:12 +0000 (08:05 -0800)
commitb276a876a014c5fa58a16f247c0933f6c42112e3
treec49f85e03d11296683ed938864bd823cdeaa614f
parentd02f7aa8dce8166dbbc515ce393912aa45e6b8a6
blkcg: add blkg_policy_data->plid

Add pd->plid so that the policy a pd belongs to can be identified
easily.  This will be used to implement hierarchical blkg_[rw]stats.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
block/blk-cgroup.c
block/blk-cgroup.h