Hi Jacopo, kernel test robot noticed the following build warnings: [auto build test WARNING on 61ab89c1916219ccbeca9f6cefb1680212de8d1c] url: https://github.com/intel-lab-lkp/linux/commits/Jacopo-Mondi/media-dt-bindings-Add-OmniVision-OV64A40/20231115-035231 base: 61ab89c1916219ccbeca9f6cefb1680212de8d1c patch link: https://lore.kernel.org/r/20231114182831.220823-3-jacopo.mondi%40ideasonboard.com patch subject: [PATCH v2 2/2] media: i2c: Add driver for OmniVision OV64A40 config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20231115/202311152102.decxO6op-lkp@xxxxxxxxx/config) compiler: alpha-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231115/202311152102.decxO6op-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/202311152102.decxO6op-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): drivers/media/i2c/ov64a40.c:2808:31: warning: no previous prototype for 'ov64a40_get_timings' [-Wmissing-prototypes] 2808 | const struct ov64a40_timings *ov64a40_get_timings(struct ov64a40 *ov64a40) | ^~~~~~~~~~~~~~~~~~~ drivers/media/i2c/ov64a40.c: In function 'ov64a40_remove': drivers/media/i2c/ov64a40.c:3609:25: warning: unused variable 'ov64a40' [-Wunused-variable] 3609 | struct ov64a40 *ov64a40 = sd_to_ov64a40(sd); | ^~~~~~~ drivers/media/i2c/ov64a40.c: At top level: >> drivers/media/i2c/ov64a40.c:3175:12: warning: 'ov64a40_power_on' defined but not used [-Wunused-function] 3175 | static int ov64a40_power_on(struct device *dev) | ^~~~~~~~~~~~~~~~ drivers/media/i2c/ov64a40.c:119:18: warning: 'ov64a40_link_freq_menu' defined but not used [-Wunused-const-variable=] 119 | static const s64 ov64a40_link_freq_menu[] = { | ^~~~~~~~~~~~~~~~~~~~~~ vim +/ov64a40_power_on +3175 drivers/media/i2c/ov64a40.c 3174 > 3175 static int ov64a40_power_on(struct device *dev) 3176 { 3177 struct v4l2_subdev *sd = dev_get_drvdata(dev); 3178 struct ov64a40 *ov64a40 = sd_to_ov64a40(sd); 3179 int ret; 3180 3181 ret = ov64a40_enable(dev); 3182 if (ret) 3183 return ret; 3184 3185 /* 3186 * The first configuration sequence is pretty long, so we write it 3187 * once at power-on time to avoid doing it in consecutive 3188 * start_streaming calls. 3189 */ 3190 return cci_multi_reg_write(ov64a40->cci, ov64a40_init, 3191 ARRAY_SIZE(ov64a40_init), NULL); 3192 } 3193 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
