Hi Laurent, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on geert-m68k/for-next] [also build test WARNING on linux/master gerg-m68knommu/for-next linus/master v5.16 next-20220113] [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/Laurent-Vivier/m68k-Add-Virtual-... base: https://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k.git for-next config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20220113/202201131603.TkF80Rn5-lk...) 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/f169b75339fd0f82fc1b5ed82611f70fc... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Laurent-Vivier/m68k-Add-Virtual-M68k-Machine/20220113-054106 git checkout f169b75339fd0f82fc1b5ed82611f70fccc1401f # 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 arch/m68k/virt/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 45 | static int goldfish_timer_set_oneshot(struct clock_event_device *evt) | ^~~~~~~~~~~~~~~~~~ arch/m68k/virt/timer.c:55:43: warning: 'struct clock_event_device' declared inside parameter list will not be visible outside of this definition or declaration 55 | static int goldfish_timer_shutdown(struct clock_event_device *evt) | ^~~~~~~~~~~~~~~~~~ arch/m68k/virt/timer.c:63:45: warning: 'struct clock_event_device' declared inside parameter list will not be visible outside of this definition or declaration 63 | struct clock_event_device *evt) | ^~~~~~~~~~~~~~~~~~ arch/m68k/virt/timer.c:79:8: error: variable 'goldfish_timer_clockevent' has initializer but incomplete type 79 | struct clock_event_device goldfish_timer_clockevent = { | ^~~~~~~~~~~~~~~~~~ arch/m68k/virt/timer.c:80:10: error: 'struct clock_event_device' has no member named 'name' 80 | .name = "goldfish_timer", | ^~~~ 80 | .name = "goldfish_timer", | ^~~~~~~~~~~~~~~~ arch/m68k/virt/timer.c:80:35: note: (near initialization for 'goldfish_timer_clockevent') arch/m68k/virt/timer.c:81:10: error: 'struct clock_event_device' has no member named 'features' 81 | .features = CLOCK_EVT_FEAT_ONESHOT, | ^~~~~~~~ arch/m68k/virt/timer.c:81:35: error: 'CLOCK_EVT_FEAT_ONESHOT' undeclared here (not in a function) 81 | .features = CLOCK_EVT_FEAT_ONESHOT, | ^~~~~~~~~~~~~~~~~~~~~~ arch/m68k/virt/timer.c:81:35: warning: excess elements in struct initializer arch/m68k/virt/timer.c:81:35: note: (near initialization for 'goldfish_timer_clockevent') arch/m68k/virt/timer.c:82:10: error: 'struct clock_event_device' has no member named 'set_state_shutdown' 82 | .set_state_shutdown = goldfish_timer_shutdown, | ^~~~~~~~~~~~~~~~~~ arch/m68k/virt/timer.c:82:35: warning: excess elements in struct initializer 82 | .set_state_shutdown = goldfish_timer_shutdown, | ^~~~~~~~~~~~~~~~~~~~~~~ arch/m68k/virt/timer.c:82:35: note: (near initialization for 'goldfish_timer_clockevent') arch/m68k/virt/timer.c:83:10: error: 'struct clock_event_device' has no member named 'set_state_oneshot' 83 | .set_state_oneshot = goldfish_timer_set_oneshot, | ^~~~~~~~~~~~~~~~~ arch/m68k/virt/timer.c:83:35: warning: excess elements in struct initializer 83 | .set_state_oneshot = goldfish_timer_set_oneshot, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ arch/m68k/virt/timer.c:83:35: note: (near initialization for 'goldfish_timer_clockevent') arch/m68k/virt/timer.c:84:10: error: 'struct clock_event_device' has no member named 'set_next_event' 84 | .set_next_event = goldfish_timer_next_event, | ^~~~~~~~~~~~~~ arch/m68k/virt/timer.c:84:35: warning: excess elements in struct initializer 84 | .set_next_event = goldfish_timer_next_event, | ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/m68k/virt/timer.c:84:35: note: (near initialization for 'goldfish_timer_clockevent') arch/m68k/virt/timer.c:85:10: error: 'struct clock_event_device' has no member named 'shift' 85 | .shift = 32, | ^~~~~ arch/m68k/virt/timer.c:85:35: warning: excess elements in struct initializer 85 | .shift = 32, | ^~ arch/m68k/virt/timer.c:85:35: note: (near initialization for 'goldfish_timer_clockevent') arch/m68k/virt/timer.c: In function 'golfish_timer_tick': arch/m68k/virt/timer.c:92:12: error: invalid use of undefined type 'struct clock_event_device' 92 | evt->event_handler(evt); | ^~ arch/m68k/virt/timer.c: In function 'virt_sched_init': arch/m68k/virt/timer.c:110:9: error: implicit declaration of function 'clockevents_config_and_register' [-Werror=implicit-function-declaration] 110 | clockevents_config_and_register(&goldfish_timer_clockevent, NSEC_PER_SEC, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/m68k/virt/timer.c: At top level: arch/m68k/virt/timer.c:79:27: error: storage size of 'goldfish_timer_clockevent' isn't known 79 | struct clock_event_device goldfish_timer_clockevent = { | ^~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +45 arch/m68k/virt/timer.c 44 46 { 47 gf_timer->alarm_high = 0; 48 gf_timer->alarm_low = 0; 49 50 gf_timer->irq_enabled = 1; 51 52 return 0; 53 } 54 55 static int goldfish_timer_shutdown(struct clock_event_device *evt) 56 { 57 gf_timer->irq_enabled = 0; 58 59 return 0; 60 } 61 62 static int goldfish_timer_next_event(unsigned long delta, 63 struct clock_event_device *evt) 64 { 65 u64 now; 66 67 gf_timer->clear_interrupt = 1; 68 69 now = goldfish_timer_read(NULL); 70 71 now += delta; 72 73 gf_timer->alarm_high = upper_32_bits(now); 74 gf_timer->alarm_low = lower_32_bits(now); 75 76 return 0; 77 } 78 79 struct clock_event_device goldfish_timer_clockevent = { 81 .features = CLOCK_EVT_FEAT_ONESHOT, 82 .set_state_shutdown = goldfish_timer_shutdown, 83 .set_state_oneshot = goldfish_timer_set_oneshot, 84 .set_next_event = goldfish_timer_next_event, 85 .shift = 32, 86 }; 87 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org