[PATCH v1 2/9] hwmon: (gxp_fan_ctrl) Give GPIO access to fan data

[kernel test robot]

Hi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on groeck-staging/hwmon-next]
[also build test WARNING on robh/for-next linus/master v6.3-rc7]
[cannot apply to brgl/gpio/for-next next-20230417]
[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/nick-hawkins-hpe-com/gpio-gxp-Add-HPE-GXP-GPIO/20230418-233513
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next
patch link:    https://lore.kernel.org/r/20230418152824.110823-3-nick.hawkins%40hpe.com
patch subject: [PATCH v1 2/9] hwmon: (gxp_fan_ctrl) Give GPIO access to fan data
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20230419/202304190119.scX6TsQH-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/be3722d7f32fea1ea375090d05cbfdd3dd4e04d3
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review nick-hawkins-hpe-com/gpio-gxp-Add-HPE-GXP-GPIO/20230418-233513
        git checkout be3722d7f32fea1ea375090d05cbfdd3dd4e04d3
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash drivers/hwmon/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp at intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304190119.scX6TsQH-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/hwmon/gxp-fan-ctrl.c:32:4: warning: no previous prototype for 'get_fans_installed' [-Wmissing-prototypes]
      32 | u8 get_fans_installed(void)
         |    ^~~~~~~~~~~~~~~~~~
>> drivers/hwmon/gxp-fan-ctrl.c:52:4: warning: no previous prototype for 'get_fans_failed' [-Wmissing-prototypes]
      52 | u8 get_fans_failed(void)
         |    ^~~~~~~~~~~~~~~


vim +/get_fans_installed +32 drivers/hwmon/gxp-fan-ctrl.c

    31	
  > 32	u8 get_fans_installed(void)
    33	{
    34		static u8 val;
    35	
    36		val = readb(drvdata->plreg + OFS_FAN_INST);
    37	
    38		return val;
    39	}
    40	EXPORT_SYMBOL(get_fans_installed);
    41	
    42	static long fan_failed(struct device *dev, int fan)
    43	{
    44		struct gxp_fan_ctrl_drvdata *drvdata = dev_get_drvdata(dev);
    45		u8 val;
    46	
    47		val = readb(drvdata->plreg + OFS_FAN_FAIL);
    48	
    49		return !!(val & BIT(fan));
    50	}
    51	
  > 52	u8 get_fans_failed(void)
    53	{
    54		static u8 val;
    55	
    56		val = readb(drvdata->plreg + OFS_FAN_FAIL);
    57	
    58		return val;
    59	}
    60	EXPORT_SYMBOL(get_fans_failed);
    61	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests