tree 08375aff242a2efd35d830c7636ab61a3ec6a109
parent f48ec1d7885281a9c6cd7779d61f321d1b1fd741
author Tejun Heo <tj@kernel.org> 1334347886 -0700
committer Jens Axboe <axboe@kernel.dk> 1334909166 +0200

blkcg: kill blkio_list and replace blkio_list_lock with a mutex

With blkio_policy[], blkio_list is redundant and hinders with
per-queue policy activation.  Remove it.  Also, replace
blkio_list_lock with a mutex blkcg_pol_mutex and let it protect the
whole [un]registration.

This is to prepare for per-queue policy activation and doesn't cause
any functional difference.

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