diff options
Diffstat (limited to 'arch/ia64/mm')
| -rw-r--r-- | arch/ia64/mm/hugetlbpage.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/arch/ia64/mm/hugetlbpage.c b/arch/ia64/mm/hugetlbpage.c index 626258ae974..df08ae7634b 100644 --- a/arch/ia64/mm/hugetlbpage.c +++ b/arch/ia64/mm/hugetlbpage.c @@ -186,13 +186,30 @@ follow_huge_pmd(struct mm_struct *mm, unsigned long address, pmd_t *pmd, int wri return NULL; } -/* - * Do nothing, until we've worked out what to do! To allow build, we - * must remove reference to clear_page_range since it no longer exists. - */ -void hugetlb_free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *prev, - unsigned long start, unsigned long end) +void hugetlb_free_pgd_range(struct mmu_gather **tlb, + unsigned long addr, unsigned long end, + unsigned long floor, unsigned long ceiling) { + /* + * 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); } void unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) |