Re: [PATCH] tracing: hide unused functions

[Arnd Bergmann]

On Fri, Oct 13, 2017 at 2:01 PM, Arnd Bergmann <arnd@xxxxxxxx> wrote:
> After trace_selftest_startup_sched_switch is removed, trace_test_buffer()
> is now only used inside of CONFIG_FUNCTION_TRACER, leading to this
> warning:
>
> kernel/trace/trace_selftest.c:62:12: error: 'trace_test_buffer' defined but not used [-Werror=unused-function]
>
> The same is true for a few other functions called by trace_test_buffer(),
> so let's extend the #ifdef to cover all of them together.
>
> Fixes: d8c4deee6dc6 ("tracing: Remove obsolete sched_switch tracer selftest")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

Nevermind, I ran into another problem with this applied: trace_test_buffer()
is used elsewhere after all, just not for all possible combinations.

Maybe marking it as __maybe_unused would be more appropriate?

      Arnd