1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/dma-contiguous.h b/include/linux/dma-contiguous.h
index 569bbd039896..772eab5d524a 100644
--- a/include/linux/dma-contiguous.h
+++ b/include/linux/dma-contiguous.h
@@ -53,13 +53,18 @@
 
 #ifdef __KERNEL__
 
-#include <linux/device.h>
-
 struct cma;
 struct page;
+struct device;
 
 #ifdef CONFIG_DMA_CMA
 
+/*
+ * There is always at least global CMA area and a few optional device
+ * private areas configured in kernel .config.
+ */
+#define MAX_CMA_AREAS	(1 + CONFIG_CMA_AREAS)
+
 extern struct cma *dma_contiguous_default_area;
 
 static inline struct cma *dev_get_cma_area(struct device *dev)
@@ -118,6 +123,8 @@ bool dma_release_from_contiguous(struct device *dev, struct page *pages,
 
 #else
 
+#define MAX_CMA_AREAS	(0)
+
 static inline struct cma *dev_get_cma_area(struct device *dev)
 {
 	return NULL;