block: refacto blkdev_issue_zeroout
Split out two well-defined helpers for hardware supported Write Zeroes and manually writing zeroes using the Write command. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Link: https://lore.kernel.org/r/20240701165219.1571322-9-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>
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