tree: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git testing head: e5cfcce2ab02eabe42d31fa5d29ffdbebfd48675 commit: e5cfcce2ab02eabe42d31fa5d29ffdbebfd48675 [12/12] iio: hrtimer: Allow sub Hz granularity config: i386-randconfig-a005-20201215 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git/commit/?id=... git remote add iio https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git git fetch --no-tags iio testing git checkout e5cfcce2ab02eabe42d31fa5d29ffdbebfd48675 # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: drivers/iio/trigger/iio-trig-hrtimer.o: in function `iio_hrtimer_store_sampling_frequency': vim +67 drivers/iio/trigger/iio-trig-hrtimer.c 45 46 static 47 ssize_t iio_hrtimer_store_sampling_frequency(struct device *dev, 48 struct device_attribute *attr, 49 const char *buf, size_t len) 50 { 51 struct iio_trigger *trig = to_iio_trigger(dev); 52 struct iio_hrtimer_info *info = iio_trigger_get_drvdata(trig); 53 unsigned long long val; 54 int integer, fract, ret; 55 56 ret = iio_str_to_fixpoint(buf, 100, &integer, &fract); 57 if (ret) 58 return ret; 59 60 val = fract + 1000 * integer; 61 62 if (!val || val > NSEC_PER_SEC * 1000) 63 return -EINVAL; 64 65 info->sampling_frequency[0] = integer; 66 info->sampling_frequency[1] = fract * 1000; 68 69 return len; 70 } 71 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org