tree: https://github.com/AsahiLinux/linux bits/090-spi-hid head: 25070af6e6d0c750f307b019df19cc93a54b664c commit: 25070af6e6d0c750f307b019df19cc93a54b664c [12/12] WIP: HID: transport: spi: add Apple SPI transport config: x86_64-allmodconfig (https://download.01.org/0day-ci/archive/20220119/202201190058.vURTyce7-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/AsahiLinux/linux/commit/25070af6e6d0c750f307b019df19cc... git remote add asahilinux https://github.com/AsahiLinux/linux git fetch --no-tags asahilinux bits/090-spi-hid git checkout 25070af6e6d0c750f307b019df19cc93a54b664c # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/hid/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/hid/spi-hid/spi-hid-apple-of.c:24:5: warning: no previous prototype for 'spihid_apple_of_power_on' [-Wmissing-prototypes] 24 | int spihid_apple_of_power_on(struct spihid_apple_ops *ops) | ^~~~~~~~~~~~~~~~~~~~~~~~ drivers/hid/spi-hid/spi-hid-apple-of.c:40:5: warning: no previous prototype for 'spihid_apple_of_power_off' [-Wmissing-prototypes] 40 | int spihid_apple_of_power_off(struct spihid_apple_ops *ops) | ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/hid/spi-hid/spi-hid-apple-of.c:50:5: warning: no previous prototype for 'spihid_apple_of_enable_irq' [-Wmissing-prototypes] 50 | int spihid_apple_of_enable_irq(struct spihid_apple_ops *ops) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/hid/spi-hid/spi-hid-apple-of.c:59:5: warning: no previous prototype for 'spihid_apple_of_disable_irq' [-Wmissing-prototypes] 59 | int spihid_apple_of_disable_irq(struct spihid_apple_ops *ops) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/device/driver.h:21, from include/linux/device.h:32, from include/linux/spi/spi.h:10, from drivers/hid/spi-hid/spi-hid-apple.h:7, from drivers/hid/spi-hid/spi-hid-apple-of.c:14: 114 | MODULE_DEVICE_TABLE(of, spi_hid_apple_of_match); | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/module.h:244:15: note: in definition of macro 'MODULE_DEVICE_TABLE' 244 | extern typeof(name) __mod_##type##__##name##_device_table \ | ^~~~ 244 | extern typeof(name) __mod_##type##__##name##_device_table \ | ^~~~~~ drivers/hid/spi-hid/spi-hid-apple-of.c:114:1: note: in expansion of macro 'MODULE_DEVICE_TABLE' 114 | MODULE_DEVICE_TABLE(of, spi_hid_apple_of_match); | ^~~~~~~~~~~~~~~~~~~ vim +114 drivers/hid/spi-hid/spi-hid-apple-of.c 109 110 static const struct of_device_id spihid_apple_of_match[] = { 111 { .compatible = "apple,spi-hid-transport" }, 112 {}, 113 }; 115 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org