diff options
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index c6921362c5fc..915941c45169 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1211,7 +1211,7 @@ struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, return ERR_PTR(-EFAULT); /* Full NUMA hinting faults to serialise migration in fault paths */ - if ((flags & FOLL_NUMA) && pmd_numa(*pmd)) + if ((flags & FOLL_NUMA) && pmd_protnone(*pmd)) goto out; page = pmd_page(*pmd); @@ -1342,7 +1342,7 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, /* * Migrate the THP to the requested node, returns with page unlocked - * and pmd_numa cleared. + * and access rights restored. */ spin_unlock(ptl); migrated = migrate_misplaced_transhuge_page(mm, vma, @@ -1357,7 +1357,7 @@ clear_pmdnuma: BUG_ON(!PageLocked(page)); pmd = pmd_mknonnuma(pmd); set_pmd_at(mm, haddr, pmdp, pmd); - VM_BUG_ON(pmd_numa(*pmdp)); + VM_BUG_ON(pmd_protnone(*pmdp)); update_mmu_cache_pmd(vma, addr, pmdp); unlock_page(page); out_unlock: @@ -1483,7 +1483,7 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, ret = 1; if (!prot_numa) { entry = pmdp_get_and_clear_notify(mm, addr, pmd); - if (pmd_numa(entry)) + if (pmd_protnone(entry)) entry = pmd_mknonnuma(entry); entry = pmd_modify(entry, newprot); ret = HPAGE_PMD_NR; @@ -1499,7 +1499,7 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, * local vs remote hits on the zero page. */ if (!is_huge_zero_page(page) && - !pmd_numa(*pmd)) { + !pmd_protnone(*pmd)) { pmdp_set_numa(mm, addr, pmd); ret = HPAGE_PMD_NR; } @@ -1767,9 +1767,9 @@ static int __split_huge_page_map(struct page *page, pte_t *pte, entry; BUG_ON(PageCompound(page+i)); /* - * Note that pmd_numa is not transferred deliberately - * to avoid any possibility that pte_numa leaks to - * a PROT_NONE VMA by accident. + * Note that NUMA hinting access restrictions are not + * transferred to avoid any possibility of altering + * permissions across VMAs. */ entry = mk_pte(page + i, vma->vm_page_prot); entry = maybe_mkwrite(pte_mkdirty(entry), vma); |