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authorChristoph Hellwig <hch@lst.de>2017-04-05 19:21:10 +0200
committerJens Axboe <axboe@fb.com>2017-04-08 11:25:38 -0600
commitcb365b9675fda026caba4cb5df83292cb7c0811a (patch)
treefbb1e83537ed759ae63b5e1dc93f741acb30d552 /include
parentd928be9f853b9755692d7e9aed402c1809a88e56 (diff)
block: add a new BLKDEV_ZERO_NOFALLBACK flag
This avoids fallbacks to explicit zeroing in (__)blkdev_issue_zeroout if the caller doesn't want them. Also clean up the convoluted check for the return condition that this new flag is added to. 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>
Diffstat (limited to 'include')
-rw-r--r--include/linux/blkdev.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index bd60f4401c9d..21a30f011674 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1350,6 +1350,7 @@ extern int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
struct bio **biop);
#define BLKDEV_ZERO_NOUNMAP (1 << 0) /* do not free blocks */
+#define BLKDEV_ZERO_NOFALLBACK (1 << 1) /* don't write explicit zeroes */
extern int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp_mask, struct bio **biop,