1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 5ebcb86ac934..82dab23205c3 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -299,6 +299,12 @@ FOLIO_MATCH(memcg_data, memcg_data);
 #endif
 #undef FOLIO_MATCH
 
+static inline atomic_t *folio_mapcount_ptr(struct folio *folio)
+{
+	struct page *tail = &folio->page + 1;
+	return &tail->compound_mapcount;
+}
+
 static inline atomic_t *compound_mapcount_ptr(struct page *page)
 {
 	return &page[1].compound_mapcount;