Hi Guillaume, kernel test robot noticed the following build warnings: [auto build test WARNING on 465644ac29536d10178b5ca4684d0b84765b9fa4] url: https://github.com/intel-lab-lkp/linux/commits/Guillaume-Stols/dt-bindings-iio-adc-ad7606-Remove-spi-cpha-from-required/20241015-215831 base: 465644ac29536d10178b5ca4684d0b84765b9fa4 patch link: https://lore.kernel.org/r/20241015-ad7606_add_iio_backend_support-v5-7-654faf1ae08c%40baylibre.com patch subject: [PATCH v5 7/8] iio: adc: ad7606: Add iio-backend support config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20241019/202410190802.CLaySBOq-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/20241019/202410190802.CLaySBOq-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/202410190802.CLaySBOq-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/iio/adc/ad7606_par.c:173:22: warning: unused variable 'back' [-Wunused-variable] 173 | struct iio_backend *back; | ^~~~ 1 warning generated. vim +/back +173 drivers/iio/adc/ad7606_par.c 164 165 static int ad7606_par_probe(struct platform_device *pdev) 166 { 167 const struct ad7606_chip_info *chip_info; 168 const struct platform_device_id *id; 169 struct resource *res; 170 void __iomem *addr; 171 resource_size_t remap_size; 172 int irq; > 173 struct iio_backend *back; 174 175 /* 176 * If a firmware node is available (ACPI or DT), platform_device_id is null 177 * and we must use get_match_data. 178 */ 179 if (dev_fwnode(&pdev->dev)) { 180 chip_info = device_get_match_data(&pdev->dev); 181 if (device_property_present(&pdev->dev, "io-backends")) 182 /* 183 * If a backend is available ,call the core probe with backend 184 * bops, otherwise use the former bops. 185 */ 186 return ad7606_probe(&pdev->dev, 0, NULL, 187 chip_info, 188 &ad7606_bi_bops); 189 } else { 190 id = platform_get_device_id(pdev); 191 chip_info = (const struct ad7606_chip_info *)id->driver_data; 192 } 193 194 irq = platform_get_irq(pdev, 0); 195 if (irq < 0) 196 return irq; 197 198 addr = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 199 if (IS_ERR(addr)) 200 return PTR_ERR(addr); 201 202 remap_size = resource_size(res); 203 204 return ad7606_probe(&pdev->dev, irq, addr, chip_info, 205 remap_size > 1 ? &ad7606_par16_bops : 206 &ad7606_par8_bops); 207 } 208 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
