From: Tejun Heo <tj@kernel.org>
Date: Thu, 8 Mar 2012 18:53:59 +0000 (-0800)
Subject: blkcg: restructure blkio_get_stat()
X-Git-Tag: v3.5-rc1~42^2~53
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c4c76a05382c7d05e0b911daa58a827399e9ba1a;p=pandora-kernel.git

blkcg: restructure blkio_get_stat()

Restructure blkio_get_stat() to prepare for removal of stats_lock.

* Define BLKIO_STAT_ARR_NR explicitly to denote which stats have
  subtypes instead of using BLKIO_STAT_QUEUED.

* Separate out stat acquisition and printing.  After this, there are
  only two users of blkio_fill_stat().  Just open code it.

* The code was mixing MAX_KEY_LEN and MAX_KEY_LEN - 1.  There's no
  need to subtract one.  Use MAX_KEY_LEN consistently.

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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