diff options
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/mm/memory.c b/mm/memory.c index f77c10fd26b9..568b3afde8d2 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -723,18 +723,21 @@ static void restore_exclusive_pte(struct vm_area_struct *vma, struct folio *folio = page_folio(page); pte_t orig_pte; pte_t pte; - swp_entry_t entry; orig_pte = ptep_get(ptep); pte = pte_mkold(mk_pte(page, READ_ONCE(vma->vm_page_prot))); if (pte_swp_soft_dirty(orig_pte)) pte = pte_mksoft_dirty(pte); - entry = pte_to_swp_entry(orig_pte); if (pte_swp_uffd_wp(orig_pte)) pte = pte_mkuffd_wp(pte); - else if (is_writable_device_exclusive_entry(entry)) - pte = maybe_mkwrite(pte_mkdirty(pte), vma); + + if ((vma->vm_flags & VM_WRITE) && + can_change_pte_writable(vma, address, pte)) { + if (folio_test_dirty(folio)) + pte = pte_mkdirty(pte); + pte = pte_mkwrite(pte, vma); + } VM_BUG_ON_FOLIO(pte_write(pte) && (!folio_test_anon(folio) && PageAnonExclusive(page)), folio); |