Hi Perry,

I love your patch! Perhaps something to improve:

[auto build test WARNING on rafael-pm/linux-next]
[also build test WARNING on tip/x86/core v6.0]
[cannot apply to linus/master next-20221007]
[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/20221009-151325
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: i386-allyesconfig
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/25572929f89d2f4c44fa79dcf0a30c18182c3162
        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/20221009-151325
        git checkout 25572929f89d2f4c44fa79dcf0a30c18182c3162
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/cpufreq/

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

All warnings (new ones prefixed by >>):

   drivers/cpufreq/amd-pstate.c: In function 'amd_pstate_get_energy_pref_index':
   drivers/cpufreq/amd-pstate.c:253:15: error: implicit declaration of function 'amd_pstate_get_epp' [-Werror=implicit-function-declaration]
     253 |         epp = amd_pstate_get_epp(cpudata, 0);
         |               ^~~~~~~~~~~~~~~~~~
   drivers/cpufreq/amd-pstate.c: In function 'store_energy_performance_preference':
   drivers/cpufreq/amd-pstate.c:907:15: error: implicit declaration of function 'amd_pstate_set_energy_pref_index'; did you mean 'amd_pstate_get_energy_pref_index'? [-Werror=implicit-function-declaration]
     907 |         ret = amd_pstate_set_energy_pref_index(cpudata, ret, raw, epp);
         |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         |               amd_pstate_get_energy_pref_index
   drivers/cpufreq/amd-pstate.c: In function 'update_boost_state':
   drivers/cpufreq/amd-pstate.c:998:29: warning: variable 'cpudata' set but not used [-Wunused-but-set-variable]
     998 |         struct amd_cpudata *cpudata;
         |                             ^~~~~~~
   At top level:
>> drivers/cpufreq/amd-pstate.c:202:21: warning: 'epp_values' defined but not used [-Wunused-variable]
     202 | static unsigned int epp_values[] = {
         |                     ^~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/epp_values +202 drivers/cpufreq/amd-pstate.c

   201	
 > 202	static unsigned int epp_values[] = {
   203		[EPP_INDEX_DEFAULT] = 0,
   204		[EPP_INDEX_PERFORMANCE] = AMD_CPPC_EPP_PERFORMANCE,
   205		[EPP_INDEX_BALANCE_PERFORMANCE] = AMD_CPPC_EPP_BALANCE_PERFORMANCE,
   206		[EPP_INDEX_BALANCE_POWERSAVE] = AMD_CPPC_EPP_BALANCE_POWERSAVE,
   207		[EPP_INDEX_POWERSAVE] = AMD_CPPC_EPP_POWERSAVE,
   208	};
   209	

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