block: Add bdev atomic write limits helpers

Add helpers to get atomic write limits for a bdev, so that we don't access
request_queue helpers outside the block layer.

We check if the bdev can actually atomic write in these helpers, so we
can avoid users missing using this check.

Suggested-by: Christoph Hellwig <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Darrick J. Wong <[email protected]>
Signed-off-by: John Garry <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>

0 files changed, 0 insertions, 0 deletions