linux-kernel - 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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Message-ID: <20220715230441.64c89d63@gandalf.local.home>
Date:   Fri, 15 Jul 2022 23:04:41 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     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: [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 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