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[Xen-devel] [PATCH V3 1/9] block: add a helper function to read nr_setcs
- To: linux-block@xxxxxxxxxxxxxxx
- From: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
- Date: Tue, 2 Jul 2019 10:42:27 -0700
- Cc: damien.lemoal@xxxxxxx, linux-btrace@xxxxxxxxxxxxxxx, bvanassche@xxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, konrad.wilk@xxxxxxxxxx, Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>, yuchao0@xxxxxxxxxx, colyli@xxxxxxx, linux-bcache@xxxxxxxxxxxxxxx, jaegeuk@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, kent.overstreet@xxxxxxxxx, roger.pau@xxxxxxxxxx
- Delivery-date: Tue, 02 Jul 2019 17:44:45 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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 | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 592669bcc536..be7ee5a0b0dd 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1475,6 +1475,12 @@ static inline void put_dev_sector(Sector p)
put_page(p.v);
}
+/* Helper function to read the bdev->bd_part->nr_sects */
+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);
--
2.19.1
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