tree acaaab3667e0450f0f05464426c3540c89ce4e18
parent 3d48749d93a3dce732dd30a14002ab90ec4355f3
author Tejun Heo <tj@kernel.org> 1330982126 -0800
committer Jens Axboe <axboe@kernel.dk> 1331065644 +0100

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>