--- zzzz-none-000/linux-3.10.107/arch/blackfin/include/asm/def_LPBlackfin.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/blackfin/include/asm/def_LPBlackfin.h	2021-02-04 17:41:59.000000000 +0000
@@ -544,6 +544,7 @@
 #define DCBS_P			0x04	/* L1 Data Cache Bank Select */
 #define PORT_PREF0_P		0x12	/* DAG0 Port Preference */
 #define PORT_PREF1_P		0x13	/* DAG1 Port Preference */
+#define RDCHK			0x9	/* Enable L1 Parity Check */
 
 /* Masks */
 #define ENDM               0x00000001	/* (doesn't really exist) Enable