Hi "Michał,

I love your patch! Perhaps something to improve:

[auto build test WARNING on power-supply/for-next]
[also build test WARNING on hwmon/hwmon-next linus/master v5.6 next-20200404]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Micha-Miros-aw/extensions-and-fixes/20200405-044024
base:   https://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git for-next
config: x86_64-randconfig-b002-20200405 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 62f3a9650a9f289a07a5f480764fb655178c2334)
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> drivers/power/supply/power_supply_hwmon.o: warning: objtool: power_supply_hwmon_read_string() falls through to next function power_supply_hwmon_write()

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