Re: [PATCH v3] kernel: sched: fix preempt_disable_ip recodring for preempt_disable()

[Daniel Bristot de Oliveira]

On 02/26/2016 10:54 AM, Sebastian Andrzej Siewior wrote:
> -             trace_preempt_off(CALLER_ADDR0, get_parent_ip(CALLER_ADDR1));
> +             trace_preempt_off(CALLER_ADDR0, get_lock_parent_ip());

If !lock_functions(CALLER_ADDR0), the start/stop_critical_timing() will
be called with parent_ip == ip.

Hence, the following trace on start_critical_timing():

        __trace_function(tr, ip, parent_ip, flags, preempt_count());

Will show the function calling itself.

Is it a problem? am I missing something?

-- Daniel