--- zzzz-none-000/linux-4.4.60/arch/arm64/include/asm/cacheflush.h	2017-04-08 07:53:53.000000000 +0000
+++ dragonfly-4020-701/linux-4.4.60/arch/arm64/include/asm/cacheflush.h	2018-11-08 13:36:17.000000000 +0000
@@ -85,6 +85,12 @@
 extern void __dma_map_area(const void *, size_t, int);
 extern void __dma_unmap_area(const void *, size_t, int);
 extern void __dma_flush_range(const void *, const void *);
+extern void __dma_inv_range(const void *, const void *);
+extern void __dma_clean_range(const void *, const void *);
+
+#define dmac_flush_range __dma_flush_range
+#define dmac_inv_range __dma_inv_range
+#define dmac_clean_range __dma_clean_range
 
 /*
  * Copy user data from/to a page which is mapped into a different