Re: [PATCH v9 net-next 7/7] mfd: ocelot: add support for the vsc7512 chip via spi

[kernel test robot]

Hi Colin,

I love your patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Colin-Foster/add-support-for-VSC7512-control-over-SPI/20220611-015854
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 7defbc9aed2b1fdf21586b78e085c468fd95a2d1
config: arc-allyesconfig (https://download.01.org/0day-ci/archive/20220611/202206110358.2hO4gzbU-lkp@xxxxxxxxx/config)
compiler: arceb-elf-gcc (GCC) 11.3.0
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/be13bccb3f0b376d8d189aa8d14e5b461701f4db
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Colin-Foster/add-support-for-VSC7512-control-over-SPI/20220611-015854
        git checkout be13bccb3f0b376d8d189aa8d14e5b461701f4db
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash drivers/mfd/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> drivers/mfd/ocelot-core.c:81:16: warning: no previous prototype for 'ocelot_init_regmap_from_resource' [-Wmissing-prototypes]
      81 | struct regmap *ocelot_init_regmap_from_resource(struct device *child,
         |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/ocelot_init_regmap_from_resource +81 drivers/mfd/ocelot-core.c

    80	
  > 81	struct regmap *ocelot_init_regmap_from_resource(struct device *child,
    82							const struct resource *res)
    83	{
    84		struct device *dev = child->parent;
    85	
    86		return ocelot_spi_init_regmap(dev, child, res);
    87	}
    88	EXPORT_SYMBOL_NS(ocelot_init_regmap_from_resource, MFD_OCELOT);
    89	

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