# \[PATCH 20/29\] pstore/blk: use bdev\_nr\_sectors instead of open coding it

- From: Christoph Hellwig \<hch@lst.de\>
- Date: 2021-10-13 05:38:08 
- List: linux-block
- Page: https://ratatoskr.run/linux-block/2021/10/215841
- Thread: https://ratatoskr.run/linux-block/2021/10/215820/t.md

```text
Use the proper helper to read the block device size.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/pstore/blk.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/pstore/blk.c b/fs/pstore/blk.c
index 04ce58c939a0b..f43009cb2ec82 100644
--- a/fs/pstore/blk.c
+++ b/fs/pstore/blk.c
@@ -223,8 +223,8 @@ static int __register_pstore_blk(struct pstore_device_info *dev,
 		goto err_fput;
 	}
 
-	inode = I_BDEV(psblk_file->f_mapping->host)->bd_inode;
-	dev->zone.total_size = i_size_read(inode);
+	inode = psblk_file->f_mapping->host;
+	dev->zone.total_size = bdev_nr_sectors(I_BDEV(inode)) << SECTOR_SHIFT;
 
 	ret = __register_pstore_device(dev);
 	if (ret)
-- 
2.30.2

```