+ /*
+ * This is called only when is_hugepage_only_range(addr,),
+ * and it follows that is_hugepage_only_range(end,) also.
+ *
+ * The offset of these addresses from the base of the hugetlb
+ * region must be scaled down by HPAGE_SIZE/PAGE_SIZE so that
+ * the standard free_pgd_range will free the right page tables.
+ *
+ * If floor and ceiling are also in the hugetlb region, they
+ * must likewise be scaled down; but if outside, left unchanged.
+ */
+
+ addr = htlbpage_to_page(addr);
+ end = htlbpage_to_page(end);
+ if (is_hugepage_only_range(tlb->mm, floor, HPAGE_SIZE))
+ floor = htlbpage_to_page(floor);
+ if (is_hugepage_only_range(tlb->mm, ceiling, HPAGE_SIZE))
+ ceiling = htlbpage_to_page(ceiling);
+
+ free_pgd_range(tlb, addr, end, floor, ceiling);