diff --git a/mm/mmap.c b/mm/mmap.c
index 7a30c4988231377fbec31faf6a1dcfb7e6af44e6..facc1a75bd4fdbc9f274dbc26a7e536f0eb8f561 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1171,8 +1171,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
 	vm_flags = vma->vm_flags;
 
 	if (vma_wants_writenotify(vma))
-		vma->vm_page_prot =
-			protection_map[vm_flags & (VM_READ|VM_WRITE|VM_EXEC)];
+		vma->vm_page_prot = vm_get_page_prot(vm_flags & ~VM_SHARED);
 
 	if (!file || !vma_merge(mm, prev, addr, vma->vm_end,
 			vma->vm_flags, NULL, file, pgoff, vma_policy(vma))) {
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 55227845abbe869f0aad75724f4d10c93b5a189f..4de546899dc140d139f218fc53ff0c358c6c5a42 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -194,7 +194,7 @@ mprotect_fixup(struct vm_area_struct *vma, struct vm_area_struct **pprev,
 	vma->vm_flags = newflags;
 	vma->vm_page_prot = vm_get_page_prot(newflags);
 	if (vma_wants_writenotify(vma)) {
-		vma->vm_page_prot = vm_get_page_prot(newflags);
+		vma->vm_page_prot = vm_get_page_prot(newflags & ~VM_SHARED);
 		dirty_accountable = 1;
 	}