--- uksm-5.4.68.patch	2020-09-12 21:14:21.870005000 +0800
+++ uksm-5.4.69.patch	2020-10-01 23:32:11.559514294 +0800
@@ -1129,18 +1129,14 @@
  
  			if (!PageAnon(page)) {
  				if (pte_dirty(ptent)) {
-@@ -2169,8 +2196,10 @@ static inline void cow_user_page(struct page *dst, struct page *src, unsigned lo
- 			clear_page(kaddr);
- 		kunmap_atomic(kaddr);
- 		flush_dcache_page(dst);
--	} else
-+	} else {
- 		copy_user_highpage(dst, src, va, vma);
+@@ -2410,6 +2437,7 @@ static inline bool cow_user_page(struct page *dst, struct page *src,
+ 
+ 	if (likely(src)) {
+ 		copy_user_highpage(dst, src, addr, vma);
 +		uksm_cow_page(vma, src);
-+	}
- }
+ 		return true;
+ 	}
  
- static gfp_t __get_fault_gfp_mask(struct vm_area_struct *vma)
 @@ -2322,6 +2351,7 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
  							      vmf->address);
  		if (!new_page)