linux-kernel - Re: [kbuild-all] Re: [ammarfaizi2-block:rostedt/linux-trace/ftrace/core 30/30] include/linux/cpumask.h:95:42: warning: function 'trace_event_get_offsets_foo_bar' might be a candidate for 'gnu

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Date:   Tue, 19 Jul 2022 08:38:27 +0800
From:   "Chen, Rong A" <rong.a.chen@...el.com>
To:     Steven Rostedt <rostedt@...dmis.org>,
        kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, Ammar Faizi <ammarfaizi2@...weeb.org>,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [kbuild-all] Re:
 [ammarfaizi2-block:rostedt/linux-trace/ftrace/core 30/30]
 include/linux/cpumask.h:95:42: warning: function
 'trace_event_get_offsets_foo_bar' might be a candidate for 'gnu_printf'
 format attribute



On 7/16/2022 11:04 AM, Steven Rostedt wrote:
> On Sat, 16 Jul 2022 09:09:15 +0800
> kernel test robot <lkp@...el.com> wrote:
> 
>> All warnings (new ones prefixed by >>):
>>
>>     In file included from include/trace/define_trace.h:102,
>>                      from samples/trace_events/trace-events-sample.h:608,
>>                      from samples/trace_events/trace-events-sample.c:12:
>>     samples/trace_events/./trace-events-sample.h: In function 'trace_event_get_offsets_foo_bar':
>>>> include/linux/cpumask.h:95:42: warning: function 'trace_event_get_offsets_foo_bar' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format]
>>        95 | #define cpu_possible_mask ((const struct cpumask *)&__cpu_possible_mask)
>>           |                                          ^~~~~~~
> 
> Please quiet the gnu_printf warning. I actually missed a real build issue
> from the kernel test robot in the last patch set because it was the needle
> in the gnu_printf haystack :-p
> 
> That is, after having 10 of these warnings, I missed the one that actually
> mattered.
> 
> -- Steve

Hi Steve,

Sorry for the noise, we didn't ignore gnu_printf warning in this file,
we will ignore all gnu_printf warnings.

Best Regards,
Rong Chen