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-exp... > 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/e031cc2da2c2948230bacd1ca56cfe999... >         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(a)intel.com&gt; > > 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.