Hi Michael, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git linux-5.7.y head: fb6c7905238010236cf0750b209ce9162222eb97 commit: 4bd6574fa27559657c0e722bc4a0df7c47989a3d [9185/9999] clocksource/drivers/timer-microchip-pit64b: Select CONFIG_TIMER_OF config: openrisc-randconfig-s031-20200710 (attached as .config) compiler: or1k-linux-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 # apt-get install sparse # sparse version: v0.6.2-37-gc9676a3b-dirty git checkout 4bd6574fa27559657c0e722bc4a0df7c47989a3d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=openrisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/clocksource/timer-of.c:29:46: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] <asn:3> * @@ got struct clock_event_device *clkevt @@ drivers/clocksource/timer-of.c:29:46: sparse: expected void [noderef] <asn:3> * drivers/clocksource/timer-of.c:29:46: sparse: got struct clock_event_device *clkevt drivers/clocksource/timer-of.c:74:51: sparse: sparse: incorrect type in argument 4 (different address spaces) @@ expected void [noderef] <asn:3> *percpu_dev_id @@ got struct clock_event_device *clkevt @@ drivers/clocksource/timer-of.c:74:51: sparse: expected void [noderef] <asn:3> *percpu_dev_id drivers/clocksource/timer-of.c:74:51: sparse: got struct clock_event_device *clkevt drivers/clocksource/timer-of.c:151:24: sparse: expected void *addr vim +151 drivers/clocksource/timer-of.c dc11bae7852952 Daniel Lezcano 2017-06-05 148 5bbf4ad945a9bb Daniel Lezcano 2018-01-08 149 static __init void timer_of_base_exit(struct of_timer_base *of_base) dc11bae7852952 Daniel Lezcano 2017-06-05 150 { dc11bae7852952 Daniel Lezcano 2017-06-05 @151 iounmap(of_base->base); dc11bae7852952 Daniel Lezcano 2017-06-05 152 } dc11bae7852952 Daniel Lezcano 2017-06-05 153 :::::: The code at line 151 was first introduced by commit :::::: dc11bae78529526605c5c45c369c9512fd012093 clocksource/drivers: Add timer-of common init routine :::::: TO: Daniel Lezcano <daniel.lezcano(a)linaro.org&gt; :::::: CC: Daniel Lezcano <daniel.lezcano(a)linaro.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org