[kbuild-all] [chrome-os:chromeos-4.19 50/55] drivers/iio/light/cros_ec_light_prox.c:346:16: error: variable 'scan_mask' set but not used

tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.19 head: ce53feb85da0d335885fe5d5aa0a0deaca233b54 commit: 93069b13df55a43b3fea04cdbe3903b1c357f4ae [50/55] CHROMIUM: iio: cros_ec_light: Add FIFO support for RGB sensor config: arm64-chromiumos-qualcomm-customedconfig-chrome-os:chromeos-4.19:ce53feb85da0d335885fe5d5aa0a0deaca233b54 (attached as .config) compiler: aarch64-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 93069b13df55a43b3fea04cdbe3903b1c357f4ae # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 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 >>): drivers/iio/light/cros_ec_light_prox.c: In function 'cros_ec_light_push_data_rgb': 346 | unsigned long scan_mask; | ^~~~~~~~~ cc1: all warnings being treated as errors vim +/scan_mask +346 drivers/iio/light/cros_ec_light_prox.c 338 339 static int cros_ec_light_push_data_rgb( 340 struct iio_dev *indio_dev, 341 s16 *data, 342 s64 timestamp) 343 { 344 struct cros_ec_sensors_core_state *st = iio_priv(indio_dev); 345 s16 *out; 347 unsigned int i; 348 349 if (!st || !indio_dev->active_scan_mask) 350 return 0; 351 352 scan_mask = *(indio_dev->active_scan_mask); 353 /* 354 * Send all data needed. 355 */ 356 out = (s16 *)st->samples; 357 for_each_set_bit(i, 358 indio_dev->active_scan_mask, 359 indio_dev->masklength) { 360 if (i > 0) 361 *out = data[i - 1]; 362 out++; 363 } 364 iio_push_to_buffers_with_timestamp(indio_dev, st->samples, timestamp); 365 return 0; 366 } 367 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org