[dm-devel] [PATCH 03/16] block: add bdev_zone_no helper

[Pankaj Raghav]

Many places in the filesystem for zoned devices open code this function
to find the zone number for a given sector with power of 2 assumption.
This generic helper can be used to calculate zone number for a given
sector in a block device

This helper internally uses blk_queue_zone_no to find the zone number.

Reviewed-by: Luis Chamberlain <mcgrof at kernel.org>
Signed-off-by: Pankaj Raghav <p.raghav at samsung.com>
---
 include/linux/blkdev.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index f8f2d2998afb..55293e0a8702 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1392,6 +1392,15 @@ static inline bool bdev_zone_aligned(struct block_device *bdev, sector_t sec)
 	return false;
 }
 
+static inline unsigned int bdev_zone_no(struct block_device *bdev, sector_t sec)
+{
+	struct request_queue *q = bdev_get_queue(bdev);
+
+	if (q)
+		return blk_queue_zone_no(q, sec);
+	return 0;
+}
+
 static inline unsigned int bdev_max_open_zones(struct block_device *bdev)
 {
 	struct request_queue *q = bdev_get_queue(bdev);
-- 
2.25.1