tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.19 head: 9238e47da086f0075b28712a867544a7cda5e9e1 commit: 4b88c39b1b5ad6db8510376b0b79ced4067740da [20/56] BACKPORT: platform/chrome: cros-ec: Record event timestamp in the hard irq config: alpha-allyesconfig (attached as .config) compiler: alpha-linux-gcc (GCC) 9.3.0 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 git checkout 4b88c39b1b5ad6db8510376b0b79ced4067740da # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the chrome-os/chromeos-4.19 HEAD 9238e47da086f0075b28712a867544a7cda5e9e1 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): 203 | static s64 cros_ec_get_time_ns(void) | ^~~~~~~~~~~~~~~~~~~ In file included from include/linux/iio/common/cros_ec_sensors_core.h:22, from drivers/iio/common/cros_ec_sensors/cros_ec_sensors_ring.c:23: include/linux/platform_data/cros_ec_proto.h:233:23: note: previous definition of 'cros_ec_get_time_ns' was here 233 | static inline ktime_t cros_ec_get_time_ns(void) | ^~~~~~~~~~~~~~~~~~~ vim +/cros_ec_get_time_ns +203 drivers/iio/common/cros_ec_sensors/cros_ec_sensors_ring.c 4b208bef8954b0 Enric Balletbo i Serra 2017-06-19 202 25c433d3355981 Gwendal Grignou 2019-10-27 @203 static s64 cros_ec_get_time_ns(void) 25c433d3355981 Gwendal Grignou 2019-10-27 204 { 25c433d3355981 Gwendal Grignou 2019-10-27 205 struct timespec ts; 25c433d3355981 Gwendal Grignou 2019-10-27 206 25c433d3355981 Gwendal Grignou 2019-10-27 207 get_monotonic_boottime(&ts); 25c433d3355981 Gwendal Grignou 2019-10-27 208 return timespec_to_ns(&ts); 25c433d3355981 Gwendal Grignou 2019-10-27 209 } 25c433d3355981 Gwendal Grignou 2019-10-27 210 :::::: The code at line 203 was first introduced by commit :::::: 25c433d3355981533f4954d8c53de14d4c5f75fe Revert "CHROMIUM: cros-ec: record event timestamp in the hard irq" :::::: TO: Gwendal Grignou <gwendal(a)chromium.org&gt; :::::: CC: Commit Bot <commit-bot(a)chromium.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org