block: add bio_has_data() to detect whether a bio carries data or not
authorJens Axboe <jens.axboe@oracle.com>
Fri, 8 Aug 2008 09:17:12 +0000 (11:17 +0200)
committerJens Axboe <jens.axboe@oracle.com>
Thu, 9 Oct 2008 06:56:00 +0000 (08:56 +0200)
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

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