Hi Volodymyr, kernel test robot noticed the following build warnings: [auto build test WARNING on 8771b7f31b7fff91a998e6afdb60650d4bac59a5] url: https://github.com/intel-lab-lkp/linux/commits/Volodymyr-Kharuk/media-uapi-ctrls-Add-camera-trigger-controls/20240517-004536 base: 8771b7f31b7fff91a998e6afdb60650d4bac59a5 patch link: https://lore.kernel.org/r/6f666d475da17b3469fd0471531bc615f6fd797a.1715871189.git.vkh%40melexis.com patch subject: [PATCH v6 10/10] media: i2c: Add driver for mlx7502x ToF sensor config: csky-randconfig-r123-20240518 (https://download.01.org/0day-ci/archive/20240518/202405181143.nHERYo41-lkp@xxxxxxxxx/config) compiler: csky-linux-gcc (GCC) 13.2.0 reproduce: (https://download.01.org/0day-ci/archive/20240518/202405181143.nHERYo41-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/202405181143.nHERYo41-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/media/i2c/mlx7502x.c:480:12: warning: 'mlx7502x_read' defined but not used [-Wunused-function] 480 | static int mlx7502x_read(struct v4l2_subdev *sd, u16 reg, u8 *val, int val_size) | ^~~~~~~~~~~~~ vim +/mlx7502x_read +480 drivers/media/i2c/mlx7502x.c 479 > 480 static int mlx7502x_read(struct v4l2_subdev *sd, u16 reg, u8 *val, int val_size) 481 { 482 int ret; 483 unsigned char data_w[2]; 484 struct i2c_client *client = v4l2_get_subdevdata(sd); 485 486 struct i2c_msg msg[] = { 487 { 488 .addr = client->addr, 489 .flags = 0, 490 .len = 2, 491 .buf = data_w, 492 }, { 493 .addr = client->addr, 494 .flags = I2C_M_RD, 495 .len = val_size, 496 .buf = val, 497 } 498 }; 499 500 /* write reg address into first msg */ 501 put_unaligned_be16(reg, data_w); 502 503 /* Using transfer allows skip STOP between messages 504 * so we have repeated Start here 505 */ 506 ret = i2c_transfer(client->adapter, msg, 2); 507 508 return ret != 2 ? -EIO : 0; 509 } 510 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
