--- zzzz-none-000/linux-3.10.107/drivers/gpu/drm/exynos/exynos_drm_iommu.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/gpu/drm/exynos/exynos_drm_iommu.h	2021-02-04 17:41:59.000000000 +0000
@@ -14,7 +14,6 @@
 
 #define EXYNOS_DEV_ADDR_START	0x20000000
 #define EXYNOS_DEV_ADDR_SIZE	0x40000000
-#define EXYNOS_DEV_ADDR_ORDER	0x0
 
 #ifdef CONFIG_DRM_EXYNOS_IOMMU
 
@@ -30,18 +29,13 @@
 
 static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
 {
-#ifdef CONFIG_ARM_DMA_USE_IOMMU
 	struct device *dev = drm_dev->dev;
 
 	return dev->archdata.mapping ? true : false;
-#else
-	return false;
-#endif
 }
 
 #else
 
-struct dma_iommu_mapping;
 static inline int drm_create_iommu_mapping(struct drm_device *drm_dev)
 {
 	return 0;