Hi Carlos, Thank you for the patch! Yet something to improve: [auto build test ERROR on geert-m68k/for-next] [also build test ERROR on tip/timers/core tip/x86/core linus/master v5.17-rc3] [cannot apply to next-20220208] [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/Carlos-Bilbao/include-linux-Reorganize-timekeeping-and-ktime-headers/20220209-001309 base: https://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k.git for-next config: m68k-randconfig-r024-20220208 (https://download.01.org/0day-ci/archive/20220209/202202090554.VWOt2B2w-lkp@xxxxxxxxx/config) compiler: m68k-linux-gcc (GCC) 11.2.0 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/5ed7d76f2d6aabedc437bc0b99020dc655ab5719 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Carlos-Bilbao/include-linux-Reorganize-timekeeping-and-ktime-headers/20220209-001309 git checkout 5ed7d76f2d6aabedc437bc0b99020dc655ab5719 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): arch/m68k/68000/timers.c: In function 'hw_tick': >> arch/m68k/68000/timers.c:64:9: error: implicit declaration of function 'legacy_timer_tick' [-Werror=implicit-function-declaration] 64 | legacy_timer_tick(1); | ^~~~~~~~~~~~~~~~~ arch/m68k/68000/timers.c: At top level: arch/m68k/68000/timers.c:120:5: warning: no previous prototype for 'm68328_hwclk' [-Wmissing-prototypes] 120 | int m68328_hwclk(int set, struct rtc_time *t) | ^~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/legacy_timer_tick +64 arch/m68k/68000/timers.c 36a90f26aa24c5 arch/m68knommu/platform/68328/timers.c Greg Ungerer 2008-02-01 57 36a90f26aa24c5 arch/m68knommu/platform/68328/timers.c Greg Ungerer 2008-02-01 58 static irqreturn_t hw_tick(int irq, void *dummy) 36a90f26aa24c5 arch/m68knommu/platform/68328/timers.c Greg Ungerer 2008-02-01 59 { 36a90f26aa24c5 arch/m68knommu/platform/68328/timers.c Greg Ungerer 2008-02-01 60 /* Reset Timer1 */ 36a90f26aa24c5 arch/m68knommu/platform/68328/timers.c Greg Ungerer 2008-02-01 61 TSTAT &= 0; 36a90f26aa24c5 arch/m68knommu/platform/68328/timers.c Greg Ungerer 2008-02-01 62 36a90f26aa24c5 arch/m68knommu/platform/68328/timers.c Greg Ungerer 2008-02-01 63 m68328_tick_cnt += TICKS_PER_JIFFY; 09323308f63708 arch/m68k/68000/timers.c Arnd Bergmann 2020-09-24 @64 legacy_timer_tick(1); 09323308f63708 arch/m68k/68000/timers.c Arnd Bergmann 2020-09-24 65 return IRQ_HANDLED; 36a90f26aa24c5 arch/m68knommu/platform/68328/timers.c Greg Ungerer 2008-02-01 66 } 36a90f26aa24c5 arch/m68knommu/platform/68328/timers.c Greg Ungerer 2008-02-01 67 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx