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 v5.16] [cannot apply to tip/timers/core linus/master 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: s390-allmodconfig (https://download.01.org/0day-ci/archive/20220114/202201141238.HZZyqTBE-lk...) compiler: s390-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/7e887e6ec0d7193083a2f0020007688db... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Laurent-Vivier/m68k-Add-Virtual-M68k-Machine/20220114-042103 git checkout 7e887e6ec0d7193083a2f0020007688db2318c76 # 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=s390 SHELL=/bin/bash drivers/clocksource/ 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 >>): drivers/clocksource/timer-goldfish.c: In function 'goldfish_timer_init': drivers/clocksource/timer-goldfish.c:94:20: error: implicit declaration of function 'kzalloc'; did you mean 'vzalloc'? [-Werror=implicit-function-declaration] 94 | timerdrv = kzalloc(sizeof(*timerdrv), GFP_KERNEL); | ^~~~~~~ | vzalloc 94 | timerdrv = kzalloc(sizeof(*timerdrv), GFP_KERNEL); | ^ cc1: some warnings being treated as errors Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for RTC_CLASS Depends on !S390 Selected by - GOLDFISH_TIMER && GENERIC_CLOCKEVENTS WARNING: unmet direct dependencies detected for RTC_DRV_GOLDFISH Depends on RTC_CLASS && HAS_IOMEM Selected by - GOLDFISH_TIMER && GENERIC_CLOCKEVENTS vim +94 drivers/clocksource/timer-goldfish.c 88 89 void __init goldfish_timer_init(int irq, void __iomem *base) 90 { 91 struct goldfish_timer *timerdrv; 92 int ret; 93 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org