From: Tejun Heo <tj@kernel.org>
Date: Fri, 22 May 2015 22:23:27 +0000 (-0400)
Subject: writeback: add dirty_throttle_control->wb_completions
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~117^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e9770b3487328b7e28803caf6c809292dd7adbf0;p=pandora-kernel.git

writeback: add dirty_throttle_control->wb_completions

wb->completions measures the wb's proportional write bandwidth in
global_wb_domain and thus naturally tied to the wb_domain.  This patch
adds dirty_throttle_control->wb_completions which is initialized to
wb->completions by GDTC_INIT() and updates __wb_dirty_limits() to use
it instead of dereferencing wb->completions directly.

This will allow dirty_throttle_control to represent different
wb_domains and the matching wb completions.

This patch doesn't introduce any behavioral changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jan Kara <jack@suse.cz>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Greg Thelen <gthelen@google.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

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