tree: https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next head: 686fef81a6969cd25138448d5f96b91ad8ea31db commit: 00c36d73171b81563c9c73a5501743995a12fba6 [53/55] rtc: add support for the MediaTek MT2712 RTC config: c6x-allyesconfig (attached as .config) compiler: c6x-elf-gcc (GCC) 9.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 00c36d73171b81563c9c73a5501743995a12fba6 # save the attached .config to linux build tree GCC_VERSION=9.2.0 make.cross ARCH=c6x If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/rtc/rtc-mt2712.c: In function 'mt2712_rtc_set_alarm': drivers/rtc/rtc-mt2712.c:235:6: warning: unused variable 'irqen' [-Wunused-variable] 235 | u16 irqen; | ^~~~~ drivers/rtc/rtc-mt2712.c: At top level: 413 | .pm = &mt2712_pm_ops, | ^~~~~~~~~~~~~ | mt2712_rtc_ops vim +413 drivers/rtc/rtc-mt2712.c 408 409 static struct platform_driver mt2712_rtc_driver = { 410 .driver = { 411 .name = "mt2712-rtc", 412 .of_match_table = mt2712_rtc_of_match, 414 }, 415 .probe = mt2712_rtc_probe, 416 }; 417 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org