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SubjectRe: [PATCH] tty: serial: Add earlycon driver for Tegra Combined UART
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@intel.com>

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@lists.01.org
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