From 764f612c6c3c231b9c12cfae7c328ccc9c453258 Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@canonical.com>
Date: Thu, 9 Oct 2014 23:17:35 +0800
Subject: [PATCH] blk-merge: don't compute bi_phys_segments from bi_vcnt for
 cloned bio

It isn't correct to figure out req->bi_phys_segments from bio->bi_vcnt
if the bio is cloned.

Signed-off-by: Ming Lei <ming.lei@canonical.com>
Tested-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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Reading git-format-patch failed