tree: https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl.git devel head: d9ce0e9fdfd37d45f669b831d0c084a7c9338ee8 commit: e6f744c6ad4fb3b7ac06d4e22b79e435578a6d54 [63/64] pinctrl: mediatek: add pinctrl support for MT6779 SoC config: riscv-allmodconfig (attached as .config) compiler: riscv64-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 git checkout e6f744c6ad4fb3b7ac06d4e22b79e435578a6d54 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): 775 | arch_initcall(mt6779_pinctrl_init); | ^~~~~~~~~~~~~ drivers/pinctrl/mediatek/pinctrl-mt6779.c:771:19: warning: 'mt6779_pinctrl_init' defined but not used [-Wunused-function] 771 | static int __init mt6779_pinctrl_init(void) | ^~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +775 drivers/pinctrl/mediatek/pinctrl-mt6779.c 770 771 static int __init mt6779_pinctrl_init(void) 772 { 773 return platform_driver_register(&mt6779_pinctrl_driver); 774 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org