Commit 9ba0d0c8 authored Oct 19, 2020 by Jeffle Xu Committed by Jens Axboe Oct 19, 2020

io_uring: use blk_queue_nowait() to check if NOWAIT supported



commit 021a2446 ("block: add QUEUE_FLAG_NOWAIT") adds a new helper
function blk_queue_nowait() to check if the bdev supports handling of
REQ_NOWAIT or not. Since then bio-based dm device can also support
REQ_NOWAIT, and currently only dm-linear supports that since
commit 6abc4946 ("dm: add support for REQ_NOWAIT and enable it for
linear target").

Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 324bcf54

fs/io_uring.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2693,7 +2693,7 @@ static struct file __io_file_get(struct io_submit_state state, int fd)
		static bool io_bdev_nowait(struct block_device *bdev)
		{
		#ifdef CONFIG_BLOCK
		return !bdev \|\| queue_is_mq(bdev_get_queue(bdev));
		return !bdev \|\| blk_queue_nowait(bdev_get_queue(bdev));
		#else
		return true;
		#endif

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