Hi Andrea, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on jic23-iio/togreg] [also build test WARNING on linus/master linux/master v5.18-rc4 next-20220427] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/intel-lab-lkp/linux/commits/Andrea-Merello/Add-support-for-Bosch-BNO055-IMU/20220426-212132 base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg config: alpha-randconfig-r036-20220427 (https://download.01.org/0day-ci/archive/20220427/202204272204.zqCIf1KV-lkp@xxxxxxxxx/config) compiler: alpha-linux-gcc (GCC) 11.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/intel-lab-lkp/linux/commit/675ca9cd13af45cc5943dd15caad5e866fd7c971 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Andrea-Merello/Add-support-for-Bosch-BNO055-IMU/20220426-212132 git checkout 675ca9cd13af45cc5943dd15caad5e866fd7c971 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=alpha SHELL=/bin/bash drivers/iio/imu/bno055/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/iio/imu/bno055/bno055.c:1317:5: warning: no previous prototype for 'bno055_debugfs_reg_access' [-Wmissing-prototypes] 1317 | int bno055_debugfs_reg_access(struct iio_dev *iio_dev, unsigned int reg, | ^~~~~~~~~~~~~~~~~~~~~~~~~ vim +/bno055_debugfs_reg_access +1317 drivers/iio/imu/bno055/bno055.c 2f40e22369ed70 Andrea Merello 2022-04-26 1316 2f40e22369ed70 Andrea Merello 2022-04-26 @1317 int bno055_debugfs_reg_access(struct iio_dev *iio_dev, unsigned int reg, 2f40e22369ed70 Andrea Merello 2022-04-26 1318 unsigned int writeval, unsigned int *readval) 2f40e22369ed70 Andrea Merello 2022-04-26 1319 { 2f40e22369ed70 Andrea Merello 2022-04-26 1320 return 0; 2f40e22369ed70 Andrea Merello 2022-04-26 1321 } 2f40e22369ed70 Andrea Merello 2022-04-26 1322 #endif 2f40e22369ed70 Andrea Merello 2022-04-26 1323 -- 0-DAY CI Kernel Test Service https://01.org/lkp
