btrfs_calculate_block_csum_pages
void btrfs_calculate_block_csum_pages(struct btrfs_fs_info *fs_info,
btrfs_calculate_block_csum_pages(fs_info, paddrs, sums->sums + index);
return btrfs_calculate_block_csum_pages(fs_info, paddrs, dest);
btrfs_calculate_block_csum_pages(fs_info, paddrs, csum);
btrfs_calculate_block_csum_pages(fs_info, paddrs, csum_buf);
btrfs_calculate_block_csum_pages(fs_info, paddrs, csum_buf);