rbd: remove the discard_zeroes_data flag

rbd only supports discarding on large alignments, so the zeroing code
would always fall back to explicit writings of zeroes.

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

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index f24ade333e0c2b9ab3411cc3f99de5405e1b0f6a..089ac4179919d2b3b678dc23c373b457842580d3 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -4380,7 +4380,6 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
        q->limits.discard_granularity = segment_size;
        q->limits.discard_alignment = segment_size;
        blk_queue_max_discard_sectors(q, segment_size / SECTOR_SIZE);
-       q->limits.discard_zeroes_data = 1;
 
        if (!ceph_test_opt(rbd_dev->rbd_client->client, NOCRC))
                q->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES;