writeback: add comments to bdi_work structure
authorJens Axboe <jens.axboe@oracle.com>
Tue, 15 Sep 2009 18:04:57 +0000 (20:04 +0200)
committerJens Axboe <jens.axboe@oracle.com>
Wed, 16 Sep 2009 13:18:52 +0000 (15:18 +0200)
And document its retriever, get_next_work_item().

Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

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