From: Christoph Hellwig <hch@lst.de>
Date: Wed, 5 Apr 2017 17:21:17 +0000 (+0200)
Subject: rbd: remove the discard_zeroes_data flag
X-Git-Tag: v6.6-pxa1908~16831^2~156
X-Git-Url: https://git.dujemihanovic.xyz/?a=commitdiff_plain;h=93c1defedcae;p=linux.git

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 f24ade333e0c..089ac4179919 100644
--- 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;