# \[PATCH 27/29\] ntfs: use sb\_bdev\_nr\_blocks

- From: Christoph Hellwig \<hch@lst.de\>
- Date: 2021-10-13 05:49:19 
- List: linux-btrfs
- Page: https://ratatoskr.run/linux-btrfs/2021/10/215848
- Thread: https://ratatoskr.run/linux-block/2021/10/215820/t.md

```text
Use the sb_bdev_nr_blocks helper instead of open coding it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/ntfs/super.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 0d7e948cb29c9..5ae8de09b271b 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2772,13 +2772,12 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
 	ntfs_debug("Set device block size to %i bytes (block size bits %i).",
 			blocksize, sb->s_blocksize_bits);
 	/* Determine the size of the device in units of block_size bytes. */
-	if (!i_size_read(sb->s_bdev->bd_inode)) {
+	vol->nr_blocks = sb_bdev_nr_blocks(sb);
+	if (!vol->nr_blocks) {
 		if (!silent)
 			ntfs_error(sb, "Unable to determine device size.");
 		goto err_out_now;
 	}
-	vol->nr_blocks = i_size_read(sb->s_bdev->bd_inode) >>
-			sb->s_blocksize_bits;
 	/* Read the boot sector and return unlocked buffer head to it. */
 	if (!(bh = read_ntfs_boot_sector(sb, silent))) {
 		if (!silent)
@@ -2816,8 +2815,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
 			goto err_out_now;
 		}
 		BUG_ON(blocksize != sb->s_blocksize);
-		vol->nr_blocks = i_size_read(sb->s_bdev->bd_inode) >>
-				sb->s_blocksize_bits;
+		vol->nr_blocks = sb_bdev_nr_blocks(sb);
 		ntfs_debug("Changed device block size to %i bytes (block size "
 				"bits %i) to match volume sector size.",
 				blocksize, sb->s_blocksize_bits);
-- 
2.30.2

```