From 7276d02e241dc3595d4a18ac2456fa449e448de7 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@fb.com>
Date: Fri, 9 May 2014 15:48:23 -0600
Subject: [PATCH] block: only calculate part_in_flight() once

We first check if we have inflight IO, then retrieve that
same number again. Usually this isn't that costly since the
chance of having the data dirtied in between is small, but
there's no reason for calling part_in_flight() twice.

Signed-off-by: Jens Axboe <axboe@fb.com>
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