[PATCH V4 1/9] block: add a helper function to read nr_setcs

[Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>]

This patch introduces helper function to read the number of sectors
from struct block_device->bd_part member. For more details Please refer
to the comment in the include/linux/genhd.h for part_nr_sects_read().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
---
 include/linux/blkdev.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 0c482371c8b3..578383712093 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1464,6 +1464,11 @@ static inline void put_dev_sector(Sector p)
 	put_page(p.v);
 }
 
+static inline sector_t bdev_nr_sects(struct block_device *bdev)
+{
+	return part_nr_sects_read(bdev->bd_part);
+}
+
 int kblockd_schedule_work(struct work_struct *work);
 int kblockd_schedule_work_on(int cpu, struct work_struct *work);
 int kblockd_mod_delayed_work_on(int cpu, struct delayed_work *dwork, unsigned long delay);
-- 
2.17.0