Hi, kernel test robot noticed the following build warnings: [auto build test WARNING on 5e99f692d4e32e3250ab18d511894ca797407aec] url: https://github.com/intel-lab-lkp/linux/commits/marius-cristea-microchip-com/dt-bindings-iio-adc-adding-dt-bindings-for-PAC193X/20231025-214558 base: 5e99f692d4e32e3250ab18d511894ca797407aec patch link: https://lore.kernel.org/r/20231025134404.131485-3-marius.cristea%40microchip.com patch subject: [PATCH v2 2/2] iio: adc: adding support for pac193x config: sparc-allyesconfig (https://download.01.org/0day-ci/archive/20231026/202310260114.N4b9wmIC-lkp@xxxxxxxxx/config) compiler: sparc64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231026/202310260114.N4b9wmIC-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/202310260114.N4b9wmIC-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/iio/adc/pac1934.c:1751:36: warning: 'pac1934_acpi_match' defined but not used [-Wunused-const-variable=] 1751 | static const struct acpi_device_id pac1934_acpi_match[] = { | ^~~~~~~~~~~~~~~~~~ vim +/pac1934_acpi_match +1751 drivers/iio/adc/pac1934.c 1749 1750 /* using MCHP1930 to be compatible with WINDOWS ACPI */ > 1751 static const struct acpi_device_id pac1934_acpi_match[] = { 1752 {"MCHP1930", 0}, 1753 { } 1754 }; 1755 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki