808 	struct bow_range *backup_br;  in prepare_unchanged_range()  local
818 	backup_br = find_free_range(bc);  in prepare_unchanged_range()
819 	if (!backup_br)  in prepare_unchanged_range()
823 	backup_bi.bi_sector = backup_br->sector;  in prepare_unchanged_range()
824 	backup_bi.bi_size = min(range_size(backup_br), (u64) bi_iter->bi_size);  in prepare_unchanged_range()
825 	ret = split_range(bc, &backup_br, &backup_bi);  in prepare_unchanged_range()
837 	if (range_size(br) != range_size(backup_br)) {  in prepare_unchanged_range()
844 	ret = copy_data(bc, br, backup_br, record_checksum ? &checksum : NULL);  in prepare_unchanged_range()
850 	log_dest = backup_br->sector;  in prepare_unchanged_range()
859 	sector0 = backup_br->sector;  in prepare_unchanged_range()
860 	bc->trims_total -= range_size(backup_br);  in prepare_unchanged_range()
861 	if (backup_br->type == TRIMMED)  in prepare_unchanged_range()
862 		list_del(&backup_br->trimmed_list);  in prepare_unchanged_range()
863 	backup_br->type = br->type == SECTOR0_CURRENT ? SECTOR0_CURRENT  in prepare_unchanged_range()
866 	set_type(bc, &backup_br, backup_br->type);  in prepare_unchanged_range()