From: Tejun Heo <tj@kernel.org>
Date: Mon, 5 Mar 2012 21:15:04 +0000 (-0800)
Subject: blkcg: add blkio_policy[] array and allow one policy per policy ID
X-Git-Tag: v3.5-rc1~42^2~82
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=035d10b2fa7e5f7e9bf9465dbc39c35affd5ac32;p=pandora-kernel.git

blkcg: add blkio_policy[] array and allow one policy per policy ID

Block cgroup policies are maintained in a linked list and,
theoretically, multiple policies sharing the same policy ID are
allowed.

This patch temporarily restricts one policy per plid and adds
blkio_policy[] array which indexes registered policy types by plid.
Both the restriction and blkio_policy[] array are transitional and
will be removed once API cleanup is complete.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

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