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authorChristoph Hellwig <hch@lst.de>2022-04-15 07:52:54 +0300
committerJens Axboe <axboe@kernel.dk>2022-04-18 04:49:59 +0300
commitcf0fbf894bb543f472f682c486be48298eccf199 (patch)
tree94e16623288183a37b3448976a706a3e9e5aec74 /block
parente3cc28ea28b5f8794db2aed24f8a0282ad2e85a2 (diff)
downloadlinux-cf0fbf894bb543f472f682c486be48298eccf199.tar.xz
block: add a bdev_max_discard_sectors helper
Add a helper to query the number of sectors support per each discard bio based on the block device and use this helper to stop various places from poking into the request_queue to see if discard is supported and if so how much. This mirrors what is done e.g. for write zeroes as well. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Acked-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com> [drbd] Acked-by: Coly Li <colyli@suse.de> [bcache] Acked-by: David Sterba <dsterba@suse.com> [btrfs] Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Link: https://lore.kernel.org/r/20220415045258.199825-24-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
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