Hi Gene, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on pavel-linux-leds/for-next] [also build test WARNING on robh/for-next linus/master v5.10-rc4 next-20201118] [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/Gene-Chen/leds-mt6360-Add-LED-dr... base: git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds.git for-next config: nds32-randconfig-r001-20201118 (attached as .config) compiler: nds32le-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/a088d9624f18b888ede6b0344163b8464... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Gene-Chen/leds-mt6360-Add-LED-driver-for-MT6360/20201118-185208 git checkout a088d9624f18b888ede6b0344163b8464db82f3b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from drivers/staging/greybus/light.c:11: 160 | void devm_led_classdev_flash_unregister(struct device *parent, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/devm_led_classdev_flash_unregister +160 include/linux/led-class-flash.h 159 161 struct led_classdev_flash *fled_cdev) 162 {}; 163 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org