tree: https://github.com/frank-w/BPI-R2-4.14 5.6-main head: 1944ca382365022a8bf3895ee49b47f24e810b5d commit: 9d1096ef5c4a04ec72c1c14771bbb12485f3b7b2 [16/41] mt6625l: add changes outside driver dir config: arm-efm32_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 9d1096ef5c4a04ec72c1c14771bbb12485f3b7b2 # save the attached .config to linux build tree GCC_VERSION=9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; Note: the frank-w-bpi-r2-4.14/5.6-main HEAD 1944ca382365022a8bf3895ee49b47f24e810b5d builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): In file included from include/linux/ktime.h:239, from include/linux/timer.h:6, from include/linux/workqueue.h:9, from include/linux/rhashtable-types.h:15, from include/linux/ipc.h:7, from include/uapi/linux/sem.h:5, from include/linux/sem.h:5, from include/linux/sched.h:15, from arch/arm/kernel/asm-offsets.c:11: include/linux/timekeeping32.h:9:43: warning: 'struct timeval' declared inside parameter list will not be visible outside of this definition or declaration 9 | static inline void do_gettimeofday(struct timeval *tv) | ^~~~~~~ include/linux/timekeeping32.h: In function 'do_gettimeofday': 14 | tv->tv_sec = now.tv_sec; | ^~ include/linux/timekeeping32.h: In function 'get_monotonic_boottime': 20 | *ts = ktime_to_timespec(ktime_get_boottime()); | ^~~ 20 | *ts = ktime_to_timespec(ktime_get_boottime()); | ^~~~~~~~~~~~~~~~~ | ktime_to_timespec64 cc1: some warnings being treated as errors make[2]: *** [scripts/Makefile.build:101: arch/arm/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1113: prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:180: sub-make] Error 2 33 real 5 user 13 sys 57.58% cpu make prepare vim +14 include/linux/timekeeping32.h 15 tv->tv_usec = now.tv_nsec/1000; 16 } 17 18 static inline void get_monotonic_boottime(struct timespec *ts) 19 { 21 } 22 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org