From: Tejun Heo <tj@kernel.org>
Date: Sun, 1 Apr 2012 21:38:44 +0000 (-0700)
Subject: blkcg: move blkio_group_stats_cpu and friends to blk-throttle.c
X-Git-Tag: v3.5-rc1~42^2~28
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8a3d26151f24e2a2ffa550890144c3d54d2edb15;p=pandora-kernel.git

blkcg: move blkio_group_stats_cpu and friends to blk-throttle.c

blkio_group_stats_cpu is used only by blk-throtl and has no reason to
be defined in blkcg core.

* Move blkio_group_stats_cpu to blk-throttle.c and rename it to
  tg_stats_cpu.

* blkg_policy_data->stats_cpu is replaced with throtl_grp->stats_cpu.
  prfill functions updated accordingly.

* All related macros / functions are renamed so that they have tg_
  prefix and the unnecessary @pol arguments are dropped.

* Per-cpu stats allocation code is also moved from blk-cgroup.c to
  blk-throttle.c and gets simplified to only deal with
  BLKIO_POLICY_THROTL.  percpu stat free is performed by the exit
  method throtl_exit_blkio_group().

* throtl_reset_group_stats() implemented for
  blkio_reset_group_stats_fn method so that tg->stats_cpu can be
  reset.

Signed-off-by: Tejun Heo <tj@kernel.org>
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