--- zzzz-none-000/linux-3.10.107/arch/mips/include/asm/mach-ip28/spaces.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/mips/include/asm/mach-ip28/spaces.h	2021-02-04 17:41:59.000000000 +0000
@@ -11,11 +11,7 @@
 #ifndef _ASM_MACH_IP28_SPACES_H
 #define _ASM_MACH_IP28_SPACES_H
 
-#define CAC_BASE		0xa800000000000000
-
-#define HIGHMEM_START		(~0UL)
-
-#define PHYS_OFFSET		_AC(0x20000000, UL)
+#define PHYS_OFFSET	_AC(0x20000000, UL)
 
 #include <asm/mach-generic/spaces.h>