From beefa6ba7bf304d3de3a02cb7366fb0a7d6b27ab Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@fb.com>
Date: Fri, 29 May 2015 13:10:23 -0600
Subject: [PATCH] block: only honor SG gap prevention for merges that contain
 data

We can safely merge anything that wont generate an SG list entry,
so if the bio is data-less (discard), don't look at potential
SG gaps.

Signed-off-by: Jens Axboe <axboe@fb.com>
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Reading git-format-patch failed