md: support REQ_OP_WRITE_ZEROES

Copy & paste from the REQ_OP_WRITE_SAME code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 93347ca7c7a6..ce7a6a56cf73 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -383,6 +383,7 @@ static int raid0_run(struct mddev *mddev)
 
                 blk_queue_max_hw_sectors(mddev->queue, mddev->chunk_sectors);
                 blk_queue_max_write_same_sectors(mddev->queue, mddev->chunk_sectors);
+                blk_queue_max_write_zeroes_sectors(mddev->queue, mddev->chunk_sectors);
                 blk_queue_max_discard_sectors(mddev->queue, mddev->chunk_sectors);
 
                 blk_queue_io_min(mddev->queue, mddev->chunk_sectors << 9);
@@ -504,6 +505,7 @@ static void raid0_make_request(struct mddev *mddev, struct bio *bio)
                                                       split, disk_devt(mddev->gendisk),
                                                       bio_sector);
                         mddev_check_writesame(mddev, split);
+                        mddev_check_write_zeroes(mddev, split);
                         generic_make_request(split);
                 }
         } while (split != bio);