diff --git a/mm/memory.c b/mm/memory.c
index b03a4a2..01ec048 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2527,6 +2527,9 @@
 	int ret = 0;
 	int page_mkwrite = 0;
 	struct page *dirty_page = NULL;
+	unsigned long mmun_start;	/* For mmu_notifiers */
+	unsigned long mmun_end;		/* For mmu_notifiers */
+	bool mmun_called = false;	/* For mmu_notifiers */
 
 	old_page = vm_normal_page(vma, address, orig_pte);
 	if (!old_page) {
@@ -2704,6 +2707,11 @@
 	if (mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))
 		goto oom_free_new;
 
+	mmun_start  = address & PAGE_MASK;
+	mmun_end    = (address & PAGE_MASK) + PAGE_SIZE;
+	mmun_called = true;
+	mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
+
 	/*
 	 * Re-check the pte - we dropped the lock
 	 */
@@ -2766,14 +2774,12 @@
 	} else
 		mem_cgroup_uncharge_page(new_page);
 
+	if (new_page)
+		page_cache_release(new_page);
 unlock:
 	pte_unmap_unlock(page_table, ptl);
-	if (new_page) {
-		if (new_page == old_page)
-			/* cow happened, notify before releasing old_page */
-			mmu_notifier_invalidate_page(mm, address);
-		page_cache_release(new_page);
-	}
+	if (mmun_called)
+		mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
 	if (old_page) {
 		/*
 		 * Don't let another task, with possibly unlocked vma,