[linux-next:master 3353/9295] drivers/powercap/dtpm.c:525:22: sparse: sparse: symbol 'dtpm_node_callback' was not declared. Should it be static?

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   6705cd745adbbeac6b13002c7a30060f7b2568a5
commit: 3759ec678e8944dc2ea70cab77a300408f78ae27 [3353/9295] powercap/drivers/dtpm: Add hierarchy creation
config: x86_64-randconfig-s021-20220228 (https://download.01.org/0day-ci/archive/20220301/202203011104.TkmvSjFD-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=3759ec678e8944dc2ea70cab77a300408f78ae27
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 3759ec678e8944dc2ea70cab77a300408f78ae27
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/powercap/

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


sparse warnings: (new ones prefixed by >>)
   drivers/powercap/dtpm.c: note: in included file:
   drivers/powercap/dtpm_subsys.h:12:24: sparse: sparse: symbol 'dtpm_subsys' was not declared. Should it be static?
>> drivers/powercap/dtpm.c:525:22: sparse: sparse: symbol 'dtpm_node_callback' was not declared. Should it be static?

Please review and possibly fold the followup patch.

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