From: Christoph Hellwig <hch@lst.de>
Date: Wed, 5 Apr 2017 17:21:07 +0000 (+0200)
Subject: block: stop using blkdev_issue_write_same for zeroing
X-Git-Tag: v4.12-rc1~175^2~166
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c20cfc27a47307e811346f85959cf3cc07ae42f9;p=karo-tx-linux.git

block: stop using blkdev_issue_write_same for zeroing

We'll always use the WRITE ZEROES code for zeroing now.

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

diff --git a/block/blk-lib.c b/block/blk-lib.c
index e5b853f2b8a2..2a8d638544a7 100644
--- a/block/blk-lib.c
+++ b/block/blk-lib.c
@@ -364,10 +364,6 @@ int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
 			return 0;
 	}
 
-	if (!blkdev_issue_write_same(bdev, sector, nr_sects, gfp_mask,
-			ZERO_PAGE(0)))
-		return 0;
-
 	blk_start_plug(&plug);
 	ret = __blkdev_issue_zeroout(bdev, sector, nr_sects, gfp_mask,
 			&bio, discard);