diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/gup.c | 7 | ||||
| -rw-r--r-- | mm/hugetlb.c | 9 |
2 files changed, 16 insertions, 0 deletions
@@ -357,6 +357,13 @@ struct page *follow_page_mask(struct vm_area_struct *vma, if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd))) return no_page_table(vma, flags); + if (pgd_huge(*pgd)) { + page = follow_huge_pgd(mm, address, pgd, flags); + if (page) + return page; + return no_page_table(vma, flags); + } + return follow_p4d_mask(vma, address, pgd, flags, page_mask); } diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 65c84414a6b7..a446869aa7f1 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -4715,6 +4715,15 @@ follow_huge_pud(struct mm_struct *mm, unsigned long address, return pte_page(*(pte_t *)pud) + ((address & ~PUD_MASK) >> PAGE_SHIFT); } +struct page * __weak +follow_huge_pgd(struct mm_struct *mm, unsigned long address, pgd_t *pgd, int flags) +{ + if (flags & FOLL_GET) + return NULL; + + return pte_page(*(pte_t *)pgd) + ((address & ~PGDIR_MASK) >> PAGE_SHIFT); +} + #ifdef CONFIG_MEMORY_FAILURE /* |