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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2010-07-03 17:45:33 +0900 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2010-08-07 18:23:56 +0200 |
| commit | b6a903151d05e3912ab66b186f74c61851efb88c (patch) | |
| tree | dbf0f8d2da9aba48cac375304a9842e0166628c8 /block | |
| parent | 8749534fe6826596b71bc409c872b047a8e2755b (diff) | |
| download | lwn-b6a903151d05e3912ab66b186f74c61851efb88c.tar.gz lwn-b6a903151d05e3912ab66b186f74c61851efb88c.zip | |
block: permit PREFLUSH and POSTFLUSH without prepare_flush_fn
This is preparation for removing q->prepare_flush_fn.
Temporarily, blk_queue_ordered() permits QUEUE_ORDERED_DO_PREFLUSH and
QUEUE_ORDERED_DO_POSTFLUSH without prepare_flush_fn.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-barrier.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/block/blk-barrier.c b/block/blk-barrier.c index a3482425c507..7ce0a32a21fd 100644 --- a/block/blk-barrier.c +++ b/block/blk-barrier.c @@ -25,12 +25,6 @@ int blk_queue_ordered(struct request_queue *q, unsigned ordered, prepare_flush_fn *prepare_flush_fn) { - if (!prepare_flush_fn && (ordered & (QUEUE_ORDERED_DO_PREFLUSH | - QUEUE_ORDERED_DO_POSTFLUSH))) { - printk(KERN_ERR "%s: prepare_flush_fn required\n", __func__); - return -EINVAL; - } - if (ordered != QUEUE_ORDERED_NONE && ordered != QUEUE_ORDERED_DRAIN && ordered != QUEUE_ORDERED_DRAIN_FLUSH && @@ -146,7 +140,8 @@ static void queue_flush(struct request_queue *q, unsigned which) rq->cmd_flags = REQ_HARDBARRIER | REQ_FLUSH; rq->rq_disk = q->bar_rq.rq_disk; rq->end_io = end_io; - q->prepare_flush_fn(q, rq); + if (q->prepare_flush_fn) + q->prepare_flush_fn(q, rq); elv_insert(q, rq, ELEVATOR_INSERT_FRONT); } |