Hi Andrea, Thank you for the patch! Yet something to improve: [auto build test ERROR on jic23-iio/togreg] [also build test ERROR on linux/master linus/master v5.17-rc4 next-20220217] [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/0day-ci/linux/commits/Andrea-Merello/Add-support-for-Bosch-BNO055-IMU/20220218-002932 base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg config: i386-allyesconfig (https://download.01.org/0day-ci/archive/20220218/202202181307.Lb4f99qg-lkp@xxxxxxxxx/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/98d7db4486f0404718da9e85ae13da54d757104b git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Andrea-Merello/Add-support-for-Bosch-BNO055-IMU/20220218-002932 git checkout 98d7db4486f0404718da9e85ae13da54d757104b # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): drivers/iio/imu/bno055/bno055.c:285:5: warning: no previous prototype for 'bno055_calibration_load' [-Wmissing-prototypes] 285 | int bno055_calibration_load(struct bno055_priv *priv, const u8 *data, int len) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/iio/imu/bno055/bno055.c:748:5: warning: no previous prototype for 'bno055_sysfs_attr_avail' [-Wmissing-prototypes] 748 | int bno055_sysfs_attr_avail(struct bno055_priv *priv, struct bno055_sysfs_attr *attr, | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/iio/imu/bno055/bno055.c:1203:5: warning: no previous prototype for 'bno055_debugfs_reg_access' [-Wmissing-prototypes] 1203 | int bno055_debugfs_reg_access(struct iio_dev *iio_dev, unsigned int reg, | ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/iio/imu/bno055/bno055.c: In function 'bno055_show_fw_version': >> drivers/iio/imu/bno055/bno055.c:1235:2: error: implicit declaration of function 'kfree'; did you mean 'vfree'? [-Werror=implicit-function-declaration] 1235 | kfree(buf); | ^~~~~ | vfree cc1: some warnings being treated as errors vim +1235 drivers/iio/imu/bno055/bno055.c 16cbcd24402827b Andrea Merello 2022-02-17 1213 16cbcd24402827b Andrea Merello 2022-02-17 1214 static ssize_t bno055_show_fw_version(struct file *file, char __user *userbuf, 16cbcd24402827b Andrea Merello 2022-02-17 1215 size_t count, loff_t *ppos) 16cbcd24402827b Andrea Merello 2022-02-17 1216 { 16cbcd24402827b Andrea Merello 2022-02-17 1217 struct bno055_priv *priv = file->private_data; 16cbcd24402827b Andrea Merello 2022-02-17 1218 int rev, ver; 16cbcd24402827b Andrea Merello 2022-02-17 1219 char *buf; 16cbcd24402827b Andrea Merello 2022-02-17 1220 int ret; 16cbcd24402827b Andrea Merello 2022-02-17 1221 16cbcd24402827b Andrea Merello 2022-02-17 1222 ret = regmap_read(priv->regmap, BNO055_SW_REV_LSB_REG, &rev); 16cbcd24402827b Andrea Merello 2022-02-17 1223 if (ret) 16cbcd24402827b Andrea Merello 2022-02-17 1224 return ret; 16cbcd24402827b Andrea Merello 2022-02-17 1225 16cbcd24402827b Andrea Merello 2022-02-17 1226 ret = regmap_read(priv->regmap, BNO055_SW_REV_MSB_REG, &ver); 16cbcd24402827b Andrea Merello 2022-02-17 1227 if (ret) 16cbcd24402827b Andrea Merello 2022-02-17 1228 return ret; 16cbcd24402827b Andrea Merello 2022-02-17 1229 16cbcd24402827b Andrea Merello 2022-02-17 1230 buf = kasprintf(GFP_KERNEL, "ver: 0x%x, rev: 0x%x\n", ver, rev); 16cbcd24402827b Andrea Merello 2022-02-17 1231 if (!buf) 16cbcd24402827b Andrea Merello 2022-02-17 1232 return -ENOMEM; 16cbcd24402827b Andrea Merello 2022-02-17 1233 16cbcd24402827b Andrea Merello 2022-02-17 1234 ret = simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf)); 16cbcd24402827b Andrea Merello 2022-02-17 @1235 kfree(buf); 16cbcd24402827b Andrea Merello 2022-02-17 1236 16cbcd24402827b Andrea Merello 2022-02-17 1237 return ret; 16cbcd24402827b Andrea Merello 2022-02-17 1238 } 16cbcd24402827b Andrea Merello 2022-02-17 1239 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
