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block: add async version of bio_set_polled 

If we know that a iocb is async we can optimise bio_set_polled() a bit,
add a new helper bio_set_polled_async().

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/8fa137885164a5d05fadcff4c3521da8d5a83d00.1635337135.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-10-27 13:21:10 +01:00 committed by Jens Axboe
parent e71aa913e2
commit 842e39b013
1 changed files with 3 additions and 4 deletions
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7
block/fops.c
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@ -358,14 +358,13 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb,
task_io_account_write(bio->bi_iter.bi_size);
}
if (iocb->ki_flags & IOCB_NOWAIT)
bio->bi_opf |= REQ_NOWAIT;
if (iocb->ki_flags & IOCB_HIPRI) {
bio_set_polled(bio, iocb);
bio->bi_opf |= REQ_POLLED | REQ_NOWAIT;
submit_bio(bio);
WRITE_ONCE(iocb->private, bio);
} else {
if (iocb->ki_flags & IOCB_NOWAIT)
bio->bi_opf |= REQ_NOWAIT;
submit_bio(bio);
}
return -EIOCBQUEUED;