tree 6a712eb1b505e8163d28f8709980e581a08b572c
parent ca32aefc7f2539ed88d42763330d54ee3e61769a
author Tejun Heo <tj@kernel.org> 1330982104 -0800
committer Jens Axboe <axboe@kernel.dk> 1331065642 +0100

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>