--- zzzz-none-000/linux-2.6.39.4/drivers/gpu/drm/radeon/evergreend.h	2011-08-03 19:43:28.000000000 +0000
+++ puma6-atom-6490-729/linux-2.6.39.4/drivers/gpu/drm/radeon/evergreend.h	2021-11-10 13:38:14.000000000 +0000
@@ -64,8 +64,6 @@
 #define GB_BACKEND_MAP  				0x98FC
 #define DMIF_ADDR_CONFIG  				0xBD4
 #define HDP_ADDR_CONFIG  				0x2F48
-#define HDP_MISC_CNTL  					0x2F4C
-#define		HDP_FLUSH_INVALIDATE_CACHE      	(1 << 0)
 
 #define	CC_SYS_RB_BACKEND_DISABLE			0x3F88
 #define	GC_USER_RB_BACKEND_DISABLE			0x9B7C