Hi Kent, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on v5.7-rc5] [cannot apply to gpio/for-next linus/master linux/master v5.7-rc7 v5.7-rc6 next-20200526] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Kent-Gibson/gpiolib-split-character-device-into-gpiolib-cdev/20200528-000035 base: 2ef96a5bb12be62ef75b5828c0aab838ebb29cb8 config: nios2-allmodconfig (attached as .config) compiler: nios2-linux-gcc (GCC) 9.3.0 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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nios2 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>, old ones prefixed by <<): >> drivers/gpio/gpiolib-cdev.c:1092:5: warning: no previous prototype for 'gpiolib_cdev_register' [-Wmissing-prototypes] 1092 | int gpiolib_cdev_register(struct gpio_device *gdev, dev_t devt) | ^~~~~~~~~~~~~~~~~~~~~ >> drivers/gpio/gpiolib-cdev.c:1110:6: warning: no previous prototype for 'gpiolib_cdev_unregister' [-Wmissing-prototypes] 1110 | void gpiolib_cdev_unregister(struct gpio_device *gdev) | ^~~~~~~~~~~~~~~~~~~~~~~ vim +/gpiolib_cdev_register +1092 drivers/gpio/gpiolib-cdev.c 1091 > 1092 int gpiolib_cdev_register(struct gpio_device *gdev, dev_t devt) 1093 { 1094 int ret; 1095 1096 cdev_init(&gdev->chrdev, &gpio_fileops); 1097 gdev->chrdev.owner = THIS_MODULE; 1098 gdev->dev.devt = MKDEV(MAJOR(devt), gdev->id); 1099 1100 ret = cdev_device_add(&gdev->chrdev, &gdev->dev); 1101 if (ret) 1102 return ret; 1103 1104 chip_dbg(gdev->chip, "added GPIO chardev (%d:%d)\n", 1105 MAJOR(devt), gdev->id); 1106 1107 return 0; 1108 } 1109 > 1110 void gpiolib_cdev_unregister(struct gpio_device *gdev) 1111 { 1112 cdev_device_del(&gdev->chrdev, &gdev->dev); 1113 } 1114 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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