diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index cc839e4365c18..1fcef06a2d316 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -689,6 +689,13 @@ static __always_inline bool folio_test_anon(const struct folio *folio)
 	return ((unsigned long)folio->mapping & PAGE_MAPPING_ANON) != 0;
 }
 
+static __always_inline bool PageAnonNotKsm(const struct page *page)
+{
+	unsigned long flags = (unsigned long)page_folio(page)->mapping;
+
+	return (flags & PAGE_MAPPING_FLAGS) == PAGE_MAPPING_ANON;
+}
+
 static __always_inline bool PageAnon(const struct page *page)
 {
 	return folio_test_anon(page_folio(page));
@@ -1137,14 +1144,14 @@ static __always_inline int PageAnonExclusive(const struct page *page)
 
 static __always_inline void SetPageAnonExclusive(struct page *page)
 {
-	VM_BUG_ON_PGFLAGS(!PageAnon(page) || PageKsm(page), page);
+	VM_BUG_ON_PGFLAGS(!PageAnonNotKsm(page), page);
 	VM_BUG_ON_PGFLAGS(PageHuge(page) && !PageHead(page), page);
 	set_bit(PG_anon_exclusive, &PF_ANY(page, 1)->flags);
 }
 
 static __always_inline void ClearPageAnonExclusive(struct page *page)
 {
-	VM_BUG_ON_PGFLAGS(!PageAnon(page) || PageKsm(page), page);
+	VM_BUG_ON_PGFLAGS(!PageAnonNotKsm(page), page);
 	VM_BUG_ON_PGFLAGS(PageHuge(page) && !PageHead(page), page);
 	clear_bit(PG_anon_exclusive, &PF_ANY(page, 1)->flags);
 }