Hi Mikko, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on usb/usb-testing] [also build test WARNING on tegra/for-next linux/master linus/master v5.11-rc7 next-20210212] [cannot apply to tty/tty-testing] [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/Mikko-Perttunen/tty-serial-Add-earlycon-driver-for-Tegra-Combined-UART/20210213-200425 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing config: arm-randconfig-r016-20210213 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476) 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 # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/0day-ci/linux/commit/889104c3001a64bab09c4ac82aed58f1d98ec77a git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Mikko-Perttunen/tty-serial-Add-earlycon-driver-for-Tegra-Combined-UART/20210213-200425 git checkout 889104c3001a64bab09c4ac82aed58f1d98ec77a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 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/tty/serial/tegra-tcu-earlycon.c:62:12: warning: no previous prototype for function 'early_tegra_combined_uart_setup' [-Wmissing-prototypes] int __init early_tegra_combined_uart_setup(struct earlycon_device *device, const char *options) ^ drivers/tty/serial/tegra-tcu-earlycon.c:62:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __init early_tegra_combined_uart_setup(struct earlycon_device *device, const char *options) ^ static 1 warning generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for ARM_CPU_SUSPEND Depends on ARCH_SUSPEND_POSSIBLE Selected by - ARM_QCOM_SPM_CPUIDLE && CPU_IDLE && (ARM || ARM64) && (ARCH_QCOM || COMPILE_TEST && !ARM64 vim +/early_tegra_combined_uart_setup +62 drivers/tty/serial/tegra-tcu-earlycon.c 61 > 62 int __init early_tegra_combined_uart_setup(struct earlycon_device *device, const char *options) 63 { 64 if (!(device->port.membase)) 65 return -ENODEV; 66 67 device->con->write = early_tcu_write; 68 69 return 0; 70 } 71 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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