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 next-20221219]
[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/20221219-144514
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20221219064042.661122-6-perry.yuan%40amd.com
patch subject: [PATCH v8 05/13] cpufreq: amd-pstate: optimize driver working mode selection in amd_pstate_param()
config: x86_64-randconfig-a002-20221219
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/ca2aa3065157d1fc7ec6aec4c463143c99cb5325
        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/20221219-144514
        git checkout ca2aa3065157d1fc7ec6aec4c463143c99cb5325
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        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@intel.com>

All warnings (new ones prefixed by >>):

   In file included from drivers/cpufreq/amd-pstate-ut.c:29:
>> include/linux/amd-pstate.h:98:27: warning: 'amd_pstate_mode_string' defined but not used [-Wunused-const-variable=]
      98 | static const char * const amd_pstate_mode_string[] = {
         |                           ^~~~~~~~~~~~~~~~~~~~~~


vim +/amd_pstate_mode_string +98 include/linux/amd-pstate.h

    97	
  > 98	static const char * const amd_pstate_mode_string[] = {
    99		[AMD_PSTATE_DISABLE]     = "disable",
   100		[AMD_PSTATE_PASSIVE]     = "passive",
   101		[AMD_PSTATE_ACTIVE]      = "active",
   102		[AMD_PSTATE_GUIDE]      = "guide",
   103		NULL,
   104	};
   105	

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