diff -Nur linux-4.8.11.orig/arch/sh/kernel/cpu/sh2/probe.c linux-4.8.11/arch/sh/kernel/cpu/sh2/probe.c
--- linux-4.8.11.orig/arch/sh/kernel/cpu/sh2/probe.c	2016-11-26 09:57:13.000000000 +0100
+++ linux-4.8.11/arch/sh/kernel/cpu/sh2/probe.c	2016-12-10 10:38:27.997954035 +0100
@@ -15,6 +15,7 @@
 #include <linux/io.h>
 #include <asm/processor.h>
 #include <asm/cache.h>
+#include <asm/smp.h>
 
 #if defined(CONFIG_CPU_J2)
 extern u32 __iomem *j2_ccr_base;
