This gets us support for non-discard efficient write of zeroes (e.g. NVMe) and prepares for removing the discard_zeroes_data flag.
Also remove a pointless discard support check, which is done in blkdev_issue_discard already. Signed-off-by: Christoph Hellwig <h...@lst.de> Reviewed-by: Martin K. Petersen <martin.peter...@oracle.com> Reviewed-by: Hannes Reinecke <h...@suse.com> --- fs/block_dev.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index 2f704c3a816f..e405d8e58e31 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -2069,7 +2069,6 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start, loff_t len) { struct block_device *bdev = I_BDEV(bdev_file_inode(file)); - struct request_queue *q = bdev_get_queue(bdev); struct address_space *mapping; loff_t end = start + len - 1; loff_t isize; @@ -2108,15 +2107,10 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start, GFP_KERNEL, BLKDEV_ZERO_NOUNMAP); break; case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE: - /* Only punch if the device can do zeroing discard. */ - if (!blk_queue_discard(q) || !q->limits.discard_zeroes_data) - return -EOPNOTSUPP; - error = blkdev_issue_discard(bdev, start >> 9, len >> 9, - GFP_KERNEL, 0); + error = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, + GFP_KERNEL, BLKDEV_ZERO_NOFALLBACK); break; case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE | FALLOC_FL_NO_HIDE_STALE: - if (!blk_queue_discard(q)) - return -EOPNOTSUPP; error = blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL, 0); break; -- 2.11.0 -- dm-devel mailing list dm-devel@redhat.com https://www.redhat.com/mailman/listinfo/dm-devel