diff options
Diffstat (limited to 'mm/mprotect.c')
| -rw-r--r-- | mm/mprotect.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c index 8d770855b591..86a28c0e190f 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -46,7 +46,7 @@ static inline bool can_change_pte_writable(struct vm_area_struct *vma, VM_BUG_ON(!(vma->vm_flags & VM_WRITE) || pte_write(pte)); - if (pte_protnone(pte) || !pte_dirty(pte)) + if (pte_protnone(pte)) return false; /* Do we need write faults for softdirty tracking? */ @@ -65,11 +65,10 @@ static inline bool can_change_pte_writable(struct vm_area_struct *vma, * the PT lock. */ page = vm_normal_page(vma, addr, pte); - if (!page || !PageAnon(page) || !PageAnonExclusive(page)) - return false; + return page && PageAnon(page) && PageAnonExclusive(page); } - return true; + return pte_dirty(pte); } static unsigned long change_pte_range(struct mmu_gather *tlb, |