block: makes bio_split support bio without data
authorShaohua Li <shli@kernel.org>
Fri, 28 Sep 2012 08:38:48 +0000 (10:38 +0200)
committerJens Axboe <axboe@kernel.dk>
Fri, 28 Sep 2012 08:38:48 +0000 (10:38 +0200)
commit02f3939e1a9357b7c370a4a69717cf9c02452737
treee7cc574ca11f44ccdf6a685dc45a9a1eede1f2cd
parent232f1b51062553b7cf49f99719fbd1b8a8d80f29
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>
fs/bio.c