diff --git a/arch/powerpc/include/asm/reg_booke.h b/arch/powerpc/include/asm/reg_booke.h
index 500fe1d..b3e57ed 100644
--- a/arch/powerpc/include/asm/reg_booke.h
+++ b/arch/powerpc/include/asm/reg_booke.h
@@ -37,7 +37,11 @@
 #define MSR_KERNEL	(MSR_ME|MSR_RI|MSR_IR|MSR_DR|MSR_CE)
 #define MSR_USER	(MSR_KERNEL|MSR_PR|MSR_EE)
 #else
+#ifdef CONFIG_BDI_SWITCH
+#define MSR_KERNEL	(MSR_ME|MSR_RI|MSR_CE|MSR_DE)
+#else
 #define MSR_KERNEL	(MSR_ME|MSR_RI|MSR_CE)
+#endif
 #define MSR_USER	(MSR_KERNEL|MSR_PR|MSR_EE)
 #endif