diff --git a/mm/internal.h b/mm/internal.h
index edaab69..a25e359 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -224,13 +224,13 @@
  * PageBuddy() should be checked first by the caller to minimize race window,
  * and invalid values must be handled gracefully.
  *
- * ACCESS_ONCE is used so that if the caller assigns the result into a local
+ * READ_ONCE is used so that if the caller assigns the result into a local
  * variable and e.g. tests it for valid range before using, the compiler cannot
  * decide to remove the variable and inline the page_private(page) multiple
  * times, potentially observing different values in the tests and the actual
  * use of the result.
  */
-#define page_order_unsafe(page)		ACCESS_ONCE(page_private(page))
+#define page_order_unsafe(page)		READ_ONCE(page_private(page))
 
 static inline bool is_cow_mapping(vm_flags_t flags)
 {