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-rc4 next-20221107]
[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/20221108-020418
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20221107175705.2207842-5-Perry.Yuan%40amd.com
patch subject: [PATCH v3 4/8] cpufreq: amd_pstate: add AMD Pstate EPP support for the MSR based processors
config: i386-allyesconfig
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/3d16457032d0668bcaa51c537e74f6e1aa0c9a73
        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/20221108-020418
        git checkout 3d16457032d0668bcaa51c537e74f6e1aa0c9a73
        # 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:112:15: error: implicit declaration of function 'amd_pstate_get_epp' [-Werror=implicit-function-declaration]
     112 |         epp = amd_pstate_get_epp(cpudata, 0);
         |               ^~~~~~~~~~~~~~~~~~
   drivers/cpufreq/amd-pstate.c: In function 'store_energy_performance_preference':
   drivers/cpufreq/amd-pstate.c:767:15: error: implicit declaration of function 'amd_pstate_set_energy_pref_index'; did you mean 'amd_pstate_get_energy_pref_index'? [-Werror=implicit-function-declaration]
     767 |         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:815:29: warning: variable 'cpudata' set but not used [-Wunused-but-set-variable]
     815 |         struct amd_cpudata *cpudata;
         |                             ^~~~~~~
   In file included from drivers/cpufreq/amd-pstate.c:39:
   At top level:
   include/linux/amd-pstate.h:150:21: warning: 'epp_values' defined but not used [-Wunused-variable]
     150 | static unsigned int epp_values[] = {
         |                     ^~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/cpudata +815 drivers/cpufreq/amd-pstate.c

   811	
   812	static inline void update_boost_state(void)
   813	{
   814		u64 misc_en;
 > 815		struct amd_cpudata *cpudata;
   816	
   817		cpudata = all_cpu_data[0];
   818		rdmsrl(MSR_K7_HWCR, misc_en);
   819		global_params.cppc_boost_disabled = misc_en & BIT_ULL(25);
   820	}
   821	

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