diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index e23a9e704536..423d214f708b 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -64,8 +64,10 @@ enum {
 };
 
 #ifdef CONFIG_CMA
+bool is_cma_pageblock(struct page *page);
 #  define is_migrate_cma(migratetype) unlikely((migratetype) == MIGRATE_CMA)
 #else
+#  define is_cma_pageblock(page) false
 #  define is_migrate_cma(migratetype) false
 #endif
 
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0b9e7c1513bf..5f948b46451e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1265,6 +1265,11 @@ void __init page_alloc_init_late(void)
 #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
 
 #ifdef CONFIG_CMA
+bool is_cma_pageblock(struct page *page)
+{
+	return get_pageblock_migratetype(page) == MIGRATE_CMA;
+}
+
 /* Free whole pageblock and set its migration type to MIGRATE_CMA. */
 void __init init_cma_reserved_pageblock(struct page *page)
 {