--- zzzz-none-000/linux-3.10.107/arch/m32r/include/asm/processor.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/m32r/include/asm/processor.h	2021-02-04 17:41:59.000000000 +0000
@@ -133,5 +133,6 @@
 #define KSTK_ESP(tsk)  ((tsk)->thread.sp)
 
 #define cpu_relax()	barrier()
+#define cpu_relax_lowlatency() cpu_relax()
 
 #endif /* _ASM_M32R_PROCESSOR_H */