linux-kernel - Re: [PATCH] trace: Do some cleanups for osnoise tracer

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Date:   Mon, 13 Sep 2021 15:59:44 +0800
From:   kernel test robot <lkp@...el.com>
To:     Tang Yizhou <tangyizhou@...wei.com>, bristot@...hat.com,
        rostedt@...dmis.org
Cc:     kbuild-all@...ts.01.org, mingo@...hat.com,
        linux-kernel@...r.kernel.org, tangyizhou@...wei.com
Subject: Re: [PATCH] trace: Do some cleanups for osnoise tracer

Hi Tang,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on tip/perf/core]
[also build test WARNING on v5.15-rc1 next-20210913]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Tang-Yizhou/trace-Do-some-cleanups-for-osnoise-tracer/20210913-111459
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 4034fb207e302cc0b1f304084d379640c1fb1436
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/cecf38d3b5e23a411856f6c8f3e3be903e439876
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Tang-Yizhou/trace-Do-some-cleanups-for-osnoise-tracer/20210913-111459
        git checkout cecf38d3b5e23a411856f6c8f3e3be903e439876
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> kernel/trace/trace_osnoise.c:1826:9: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
    1826 |  .max = &timerlat_max_period,
         |         ^
   kernel/trace/trace_osnoise.c:1827:9: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
    1827 |  .min = &timerlat_min_period,
         |         ^


vim +/const +1826 kernel/trace/trace_osnoise.c

a955d7eac1779b Daniel Bristot de Oliveira 2021-06-22  1817  
a955d7eac1779b Daniel Bristot de Oliveira 2021-06-22  1818  /*
a955d7eac1779b Daniel Bristot de Oliveira 2021-06-22  1819   * osnoise/timerlat_period: min 100 us, max 1 s
a955d7eac1779b Daniel Bristot de Oliveira 2021-06-22  1820   */
cecf38d3b5e23a Tang Yizhou                2021-09-13  1821  static const u64 timerlat_min_period = 100;
cecf38d3b5e23a Tang Yizhou                2021-09-13  1822  static const u64 timerlat_max_period = 1000000;
a955d7eac1779b Daniel Bristot de Oliveira 2021-06-22  1823  static struct trace_min_max_param timerlat_period = {
a955d7eac1779b Daniel Bristot de Oliveira 2021-06-22  1824  	.lock	= &interface_lock,
a955d7eac1779b Daniel Bristot de Oliveira 2021-06-22  1825  	.val	= &osnoise_data.timerlat_period,
a955d7eac1779b Daniel Bristot de Oliveira 2021-06-22 @1826  	.max	= &timerlat_max_period,
a955d7eac1779b Daniel Bristot de Oliveira 2021-06-22  1827  	.min	= &timerlat_min_period,
a955d7eac1779b Daniel Bristot de Oliveira 2021-06-22  1828  };
a955d7eac1779b Daniel Bristot de Oliveira 2021-06-22  1829  #endif
a955d7eac1779b Daniel Bristot de Oliveira 2021-06-22  1830  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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