[Xen-devel] [PATCH V3 5/9] bcache: update cached_dev_init() with helper

[Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>]

In the bcache when initializing the cached device we don't actually
use any sort of locking when reading the number of sectors from the
part. This patch updates the cached_dev_init() with newly introduced
helper function to read the nr_sects from block device's hd_parts with
the help of part_nr_sects_read().

Acked-by: Coly Li <colyli@xxxxxxx>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
---
 drivers/md/bcache/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 1b63ac876169..6a29ba89dae1 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1263,7 +1263,7 @@ static int cached_dev_init(struct cached_dev *dc, 
unsigned int block_size)
                        q->limits.raid_partial_stripes_expensive;
 
        ret = bcache_device_init(&dc->disk, block_size,
-                        dc->bdev->bd_part->nr_sects - dc->sb.data_offset);
+                        bdev_nr_sects(dc->bdev) - dc->sb.data_offset);
        if (ret)
                return ret;
 
-- 
2.19.1


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