diff mbox series

[12/29] cramfs: use bdev_nr_sectors instead of open coding it

Message ID 20211013051042.1065752-13-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [01/29] bcache: remove bdev_sectors | expand

Commit Message

Christoph Hellwig Oct. 13, 2021, 5:10 a.m. UTC
Use the proper helper to read the block device size.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/cramfs/inode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Kees Cook Oct. 13, 2021, 6:16 a.m. UTC | #1
On Wed, Oct 13, 2021 at 07:10:25AM +0200, Christoph Hellwig wrote:
> Use the proper helper to read the block device size.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  fs/cramfs/inode.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
> index 2be65269a987c..3e44cc3ed0543 100644
> --- a/fs/cramfs/inode.c
> +++ b/fs/cramfs/inode.c
> @@ -209,7 +209,7 @@ static void *cramfs_blkdev_read(struct super_block *sb, unsigned int offset,
>  		return read_buffers[i] + blk_offset;
>  	}
>  
> -	devsize = mapping->host->i_size >> PAGE_SHIFT;
> +	devsize = bdev_nr_sectors(sb->s_bdev) >> (PAGE_SHIFT - SECTOR_SHIFT);

I find this less readable than "bytes >> PAGE_SHIFT". I'd suggest this
use a new bdev_nr_bytes() helper.
diff mbox series

Patch

diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index 2be65269a987c..3e44cc3ed0543 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -209,7 +209,7 @@  static void *cramfs_blkdev_read(struct super_block *sb, unsigned int offset,
 		return read_buffers[i] + blk_offset;
 	}
 
-	devsize = mapping->host->i_size >> PAGE_SHIFT;
+	devsize = bdev_nr_sectors(sb->s_bdev) >> (PAGE_SHIFT - SECTOR_SHIFT);
 
 	/* Ok, read in BLKS_PER_BUF pages completely first. */
 	for (i = 0; i < BLKS_PER_BUF; i++) {