linux-kernel - Re: [PATCH v5 3/9] cpufreq: amd_pstate: implement Pstate EPP support for the AMD processors

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Date:   Wed, 30 Nov 2022 08:50:48 +0800
From:   kernel test robot <lkp@...el.com>
To:     Perry Yuan <perry.yuan@....com>, rafael.j.wysocki@...el.com,
        Mario.Limonciello@....com, ray.huang@....com,
        viresh.kumar@...aro.org
Cc:     oe-kbuild-all@...ts.linux.dev, Deepak.Sharma@....com,
        Nathan.Fontenot@....com, Alexander.Deucher@....com,
        Shimmer.Huang@....com, Xiaojian.Du@....com, Li.Meng@....com,
        wyes.karny@....com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 3/9] cpufreq: amd_pstate: implement Pstate EPP support
 for the AMD processors

Hi Perry,

I love your patch! Perhaps something to improve:

[auto build test WARNING on rafael-pm/linux-next]
[also build test WARNING on linus/master v6.1-rc7 next-20221129]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Perry-Yuan/Implement-AMD-Pstate-EPP-Driver/20221129-011556
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20221128170314.2276636-4-perry.yuan%40amd.com
patch subject: [PATCH v5 3/9] cpufreq: amd_pstate: implement Pstate EPP support for the AMD processors
config: x86_64-allmodconfig
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/e353f533252a9e07649872be9e9012c4500d9133
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Perry-Yuan/Implement-AMD-Pstate-EPP-Driver/20221129-011556
        git checkout e353f533252a9e07649872be9e9012c4500d9133
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/cpufreq/

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

All warnings (new ones prefixed by >>):

   drivers/cpufreq/amd-pstate.c: In function 'update_boost_state':
>> drivers/cpufreq/amd-pstate.c:803:29: warning: variable 'cpudata' set but not used [-Wunused-but-set-variable]
     803 |         struct amd_cpudata *cpudata;
         |                             ^~~~~~~


vim +/cpudata +803 drivers/cpufreq/amd-pstate.c

   799	
   800	static inline void update_boost_state(void)
   801	{
   802		u64 misc_en;
 > 803		struct amd_cpudata *cpudata;
   804	
   805		cpudata = all_cpu_data[0];
   806		rdmsrl(MSR_K7_HWCR, misc_en);
   807		global_params.cppc_boost_disabled = misc_en & BIT_ULL(25);
   808	}
   809	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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