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: xtensa-allmodconfig (attached as .config) compiler: xtensa-linux-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=xtensa If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All error/warnings (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: 409 | static struct platform_driver mt2712_rtc_driver = { | ^~~~~~ In file included from drivers/rtc/rtc-mt2712.c:14: drivers/rtc/rtc-mt2712.c: In function 'mt2712_rtc_driver_init': 418 | module_platform_driver(mt2712_rtc_driver); | ^~~~~~~~~~~~~~~~~ include/linux/platform_device.h:214:29: note: in definition of macro 'platform_driver_register' 214 | __platform_driver_register(drv, THIS_MODULE) | ^~~ include/linux/platform_device.h:244:2: note: in expansion of macro 'module_driver' 244 | module_driver(__platform_driver, platform_driver_register, \ | ^~~~~~~~~~~~~ 418 | module_platform_driver(mt2712_rtc_driver); | ^~~~~~~~~~~~~~~~~~~~~~ drivers/rtc/rtc-mt2712.c:418:24: note: each undeclared identifier is reported only once for each function it appears in 418 | module_platform_driver(mt2712_rtc_driver); | ^~~~~~~~~~~~~~~~~ include/linux/platform_device.h:214:29: note: in definition of macro 'platform_driver_register' 214 | __platform_driver_register(drv, THIS_MODULE) | ^~~ include/linux/platform_device.h:244:2: note: in expansion of macro 'module_driver' 244 | module_driver(__platform_driver, platform_driver_register, \ | ^~~~~~~~~~~~~ 418 | module_platform_driver(mt2712_rtc_driver); | ^~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/device.h:31, from include/linux/platform_device.h:13, from drivers/rtc/rtc-mt2712.c:14: drivers/rtc/rtc-mt2712.c: In function 'mt2712_rtc_driver_exit': 418 | module_platform_driver(mt2712_rtc_driver); | ^~~~~~~~~~~~~~~~~ include/linux/device/driver.h:266:17: note: in definition of macro 'module_driver' 266 | __unregister(&(__driver) , ##__VA_ARGS__); \ | ^~~~~~~~ 418 | module_platform_driver(mt2712_rtc_driver); | ^~~~~~~~~~~~~~~~~~~~~~ drivers/rtc/rtc-mt2712.c: In function 'mt2712_rtc_driver_init': 418 | module_platform_driver(mt2712_rtc_driver); | ^~~~~~~~~~~~~~~~~~~~~~ At top level: drivers/rtc/rtc-mt2712.c:312:12: warning: 'mt2712_rtc_probe' defined but not used [-Wunused-function] 312 | static int mt2712_rtc_probe(struct platform_device *pdev) | ^~~~~~~~~~~~~~~~ vim +409 drivers/rtc/rtc-mt2712.c 408 410 .driver = { 411 .name = "mt2712-rtc", 412 .of_match_table = mt2712_rtc_of_match, 413 .pm = &mt2712_pm_ops, 414 }, 415 .probe = mt2712_rtc_probe, 416 }; 417 419 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org