From: Tejun Heo <tj@kernel.org>
Date: Mon, 5 Mar 2012 21:15:26 +0000 (-0800)
Subject: block: add io_context->active_ref
X-Git-Tag: v3.5-rc1~42^2~60
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f6e8d01bee036460e03bd4f6a79d014f98ba712e;p=pandora-kernel.git

block: add io_context->active_ref

Currently ioc->nr_tasks is used to decide two things - whether an ioc
is done issuing IOs and whether it's shared by multiple tasks.  This
patch separate out the first into ioc->active_ref, which is acquired
and released using {get|put}_io_context_active() respectively.

This will be used to associate bio's with a given task.  This patch
doesn't introduce any visible behavior change.

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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