Index: kernel/arch/ppc32/include/arch/asm.h
===================================================================
--- kernel/arch/ppc32/include/arch/asm.h	(revision 128359ebc085c950da1f7e34c3928f12654b438f)
+++ kernel/arch/ppc32/include/arch/asm.h	(revision 661a5ac96dee9520f007fe34747acee0f7403ef1)
@@ -42,4 +42,8 @@
 #include <trace.h>
 
+_NO_TRACE static inline void cpu_spin_hint(void)
+{
+}
+
 _NO_TRACE static inline uint32_t msr_read(void)
 {