# \[PATCH 09/30\] fs: use bdev\_nr\_bytes instead of open coding it in blkdev\_max\_block

- From: Christoph Hellwig \<hch@lst.de\>
- Date: 2021-10-18 10:13:31 
- List: linux-bcache
- Page: https://ratatoskr.run/linux-bcache/2021/10/216209
- Thread: https://ratatoskr.run/linux-block/2021/10/216197/t.md

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

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kees Cook <redacted>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
---
 fs/buffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/buffer.c b/fs/buffer.c
index c615387aedcae..156358977249f 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -878,7 +878,7 @@ link_dev_buffers(struct page *page, struct buffer_head *head)
 static sector_t blkdev_max_block(struct block_device *bdev, unsigned int size)
 {
 	sector_t retval = ~((sector_t)0);
-	loff_t sz = i_size_read(bdev->bd_inode);
+	loff_t sz = bdev_nr_bytes(bdev);
 
 	if (sz) {
 		unsigned int sizebits = blksize_bits(size);
-- 
2.30.2

```