On Wed, 12 May 2021, kernel test robot wrote:

> Hi Sander,
> 
> Thank you for the patch! Yet something to improve:
> 
> [auto build test ERROR on pavel-linux-leds/for-next]
> [also build test ERROR on lee-mfd/for-mfd-next pinctrl/devel v5.13-rc1]
> [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]
> 
> url:    https://github.com/0day-ci/linux/commits/Sander-Vanheule/RTL8231-GPIO-expander-support/20210511-202618
> base:   git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds.git for-next
> config: h8300-randconfig-r012-20210512 (attached as .config)
> compiler: h8300-linux-gcc (GCC) 9.3.0
> 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/0day-ci/linux/commit/e031cc2da2c2948230bacd1ca56cfe9990e1aefd
>         git remote add linux-review https://github.com/0day-ci/linux
>         git fetch --no-tags linux-review Sander-Vanheule/RTL8231-GPIO-expander-support/20210511-202618
>         git checkout e031cc2da2c2948230bacd1ca56cfe9990e1aefd
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=h8300 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> All errors (new ones prefixed by >>):
> 
>    h8300-linux-ld: drivers/mfd/rtl8231.o: in function `rtl8231_mdio_reg_write':
> >> rtl8231.c:(.text+0x4f): undefined reference to `mdiobus_write'
>    h8300-linux-ld: drivers/mfd/rtl8231.o: in function `rtl8231_mdio_reg_read':
> >> rtl8231.c:(.text+0x75): undefined reference to `mdiobus_read'
>    h8300-linux-ld: drivers/mfd/rtl8231.o: in function `mdio_module_init':
> >> rtl8231.c:(.init.text+0xd): undefined reference to `mdio_driver_register'
> 
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Please could you take a look at these failures.

Either fix them up or report a false positive.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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