btrfs: remove mirror argument from btrfs_csum_verify_data()

The parameter mirror is not used and does not make sense for checksum
verification of the given bio.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/ctree.h

@@ -3083,7 +3083,7 @@ u64 btrfs_file_extent_end(const struct btrfs_path *path);
 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio,
 				   int mirror_num, unsigned long bio_flags);
 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u32 bio_offset,
-			   struct page *page, u64 start, u64 end, int mirror);
+			   struct page *page, u64 start, u64 end);
 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
 					   u64 start, u64 len);
 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,

fs/btrfs/extent_io.c

@@ -2983,8 +2983,7 @@ static void end_bio_extent_readpage(struct bio *bio)
 		if (likely(uptodate)) {
 			if (is_data_inode(inode))
 				ret = btrfs_verify_data_csum(io_bio,
-						bio_offset, page, start, end,
-						mirror);
+						bio_offset, page, start, end);
 			else
 				ret = btrfs_validate_metadata_buffer(io_bio,
 					page, start, end, mirror);

fs/btrfs/inode.c

@@ -3140,10 +3140,9 @@ static int check_data_csum(struct inode *inode, struct btrfs_io_bio *io_bio,
  * @bio_offset:	offset to the beginning of the bio (in bytes)
  * @start:	file offset of the range start
  * @end:	file offset of the range end (inclusive)
- * @mirror:	mirror number
  */
 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u32 bio_offset,
-			   struct page *page, u64 start, u64 end, int mirror)
+			   struct page *page, u64 start, u64 end)
 {
 	struct inode *inode = page->mapping->host;
 	struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;