xiaomi-sm8450/android_kernel_xiaomi_sm8450
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block: add a poll_fn callback to struct request_queue

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That we we can also poll non blk-mq queues.  Mostly needed for
the NVMe multipath code, but could also be useful elsewhere.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2017-11-02 21:29:54 +03:00
committed by Jens Axboe
parent 8ddcd65325
commit ea435e1b93
8 changed files with 25 additions and 16 deletions
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2
fs/direct-io.c
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@@ -486,7 +486,7 @@ static struct bio *dio_await_one(struct dio *dio)
dio->waiter = current;
spin_unlock_irqrestore(&dio->bio_lock, flags);
if (!(dio->iocb->ki_flags & IOCB_HIPRI) ||
!blk_mq_poll(dio->bio_disk->queue, dio->bio_cookie))
!blk_poll(dio->bio_disk->queue, dio->bio_cookie))
io_schedule();
/* wake up sets us TASK_RUNNING */
spin_lock_irqsave(&dio->bio_lock, flags);