From: Shaohua Li <shli@kernel.org>
Date: Fri, 28 Sep 2012 08:38:48 +0000 (+0200)
Subject: block: makes bio_split support bio without data
X-Git-Tag: v3.7-rc1~54^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=02f3939e1a9357b7c370a4a69717cf9c02452737;p=pandora-kernel.git

block: makes bio_split support bio without data

discard bio hasn't data attached. We hit a BUG_ON with such bio. This makes
bio_split works for such bio.

Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

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