[PATCH 2/3] btrfs: ordered-data: rename parameter @len to @nr_sectors

[Qu Wenruo <wqu@suse.com>]

The parameter is the number of sectors of the range to search.
While most "len" we used in other locations are in byte size, this can
lead to confusion.

Rename @len to @nr_sectors to make it more clear and avoid confusion.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 fs/btrfs/ordered-data.c | 9 ++++++---
 fs/btrfs/ordered-data.h | 2 +-
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index ebac13389e7e..10c13f8a1603 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -802,9 +802,11 @@ btrfs_lookup_first_ordered_extent(struct inode *inode, u64 file_offset)
  * search the ordered extents for one corresponding to 'offset' and
  * try to find a checksum.  This is used because we allow pages to
  * be reclaimed before their checksum is actually put into the btree
+ *
+ * @nr_sectors:	The length of the search range, in sectors.
  */
 int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr,
-			   u8 *sum, int len)
+			   u8 *sum, int nr_sectors)
 {
 	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	struct btrfs_ordered_sum *ordered_sum;
@@ -828,12 +830,13 @@ int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr,
 			    inode->i_sb->s_blocksize_bits;
 			num_sectors = ordered_sum->len >>
 				      inode->i_sb->s_blocksize_bits;
-			num_sectors = min_t(int, len - index, num_sectors - i);
+			num_sectors = min_t(int, nr_sectors - index,
+					    num_sectors - i);
 			memcpy(sum + index, ordered_sum->sums + i * csum_size,
 			       num_sectors * csum_size);
 
 			index += (int)num_sectors * csum_size;
-			if (index == len)
+			if (index == nr_sectors)
 				goto out;
 			disk_bytenr += num_sectors * sectorsize;
 		}
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index d61ea9c880a3..3ffc1c27ee30 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -175,7 +175,7 @@ struct btrfs_ordered_extent *btrfs_lookup_ordered_range(
 		u64 file_offset,
 		u64 len);
 int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr,
-			   u8 *sum, int len);
+			   u8 *sum, int nr_sectors);
 u64 btrfs_wait_ordered_extents(struct btrfs_root *root, u64 nr,
 			       const u64 range_start, const u64 range_len);
 void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, u64 nr,
-- 
2.29.1