diff options
Diffstat (limited to 'arch/powerpc/mm/book3s64/subpage_prot.c')
| -rw-r--r-- | arch/powerpc/mm/book3s64/subpage_prot.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/arch/powerpc/mm/book3s64/subpage_prot.c b/arch/powerpc/mm/book3s64/subpage_prot.c index 60c6ea16a972..ec98e526167e 100644 --- a/arch/powerpc/mm/book3s64/subpage_prot.c +++ b/arch/powerpc/mm/book3s64/subpage_prot.c @@ -71,6 +71,8 @@ static void hpte_flush_range(struct mm_struct *mm, unsigned long addr, if (pmd_none(*pmd)) return; pte = pte_offset_map_lock(mm, pmd, addr, &ptl); + if (!pte) + return; arch_enter_lazy_mmu_mode(); for (; npages > 0; --npages) { pte_update(mm, addr, pte, 0, 0, 0); @@ -143,30 +145,22 @@ static int subpage_walk_pmd_entry(pmd_t *pmd, unsigned long addr, static const struct mm_walk_ops subpage_walk_ops = { .pmd_entry = subpage_walk_pmd_entry, + .walk_lock = PGWALK_WRLOCK_VERIFY, }; static void subpage_mark_vma_nohuge(struct mm_struct *mm, unsigned long addr, unsigned long len) { struct vm_area_struct *vma; + VMA_ITERATOR(vmi, mm, addr); /* * We don't try too hard, we just mark all the vma in that range * VM_NOHUGEPAGE and split them. */ - vma = find_vma(mm, addr); - /* - * If the range is in unmapped range, just return - */ - if (vma && ((addr + len) <= vma->vm_start)) - return; - - while (vma) { - if (vma->vm_start >= (addr + len)) - break; - vma->vm_flags |= VM_NOHUGEPAGE; + for_each_vma_range(vmi, vma, addr + len) { + vm_flags_set(vma, VM_NOHUGEPAGE); walk_page_vma(vma, &subpage_walk_ops, NULL); - vma = vma->vm_next; } } #else |