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[Xen-devel] [PATCH V5 1/9] block: add a helper function to read nr_setcs

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().

Reviewed-by: Minwoo Im <minwoo.im.dev@xxxxxxxxx>
Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
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 4798bb25f1ee..aa5801c8ff73 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1468,6 +1468,11 @@ static inline void put_dev_sector(Sector p)
+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);

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