On Tue, 15 Jun 2021 11:28:49 +0200 Daniel Bristot de Oliveira <bristot@xxxxxxxxxx> wrote: > diff --git a/kernel/trace/trace_osnoise.h b/kernel/trace/trace_osnoise.h > new file mode 100644 > index 000000000000..34c7b80f9e12 > --- /dev/null > +++ b/kernel/trace/trace_osnoise.h > @@ -0,0 +1,9 @@ > +int __weak osnoise_arch_register(void) > +{ > + return 0; > +} > + > +void __weak osnoise_arch_unregister(void) > +{ > + return; > +} No reason to put the above in a header file. In fact, as it is code, it should not be in a header file. Keep it in the trace_osnoise.c. -- Steve