Hi Guillaume, kernel test robot noticed the following build warnings: [auto build test WARNING on 35307f34d6fef8f9d41a1e8f4f532e4b0a7ee422] url: https://github.com/intel-lab-lkp/linux/commits/Guillaume-Stols/iio-adc-ad7606-Fix-typo-in-the-driver-name/20241005-055256 base: 35307f34d6fef8f9d41a1e8f4f532e4b0a7ee422 patch link: https://lore.kernel.org/r/20241004-ad7606_add_iio_backend_support-v3-9-38757012ce82%40baylibre.com patch subject: [PATCH v3 09/10] iio: adc: ad7606: Add iio-backend support config: x86_64-randconfig-123-20241006 (https://download.01.org/0day-ci/archive/20241006/202410061307.IHo3Eizh-lkp@xxxxxxxxx/config) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241006/202410061307.IHo3Eizh-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202410061307.IHo3Eizh-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> drivers/iio/adc/ad7606_par.c:89:29: sparse: sparse: symbol 'ad7606_bi_bops' was not declared. Should it be static? vim +/ad7606_bi_bops +89 drivers/iio/adc/ad7606_par.c 88 > 89 const struct ad7606_bus_ops ad7606_bi_bops = { 90 .iio_backend_config = ad7606_bi_setup_iio_backend, 91 .update_scan_mode = ad7606_bi_update_scan_mode, 92 }; 93 EXPORT_SYMBOL_NS_GPL(ad7606_bi_bops, IIO_AD7606); 94 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki