Re: [PATCH] serial: extend compile-test coverage

[kernel test robot]

Hi Johan,

I love your patch! Perhaps something to improve:

[auto build test WARNING on tty/tty-testing]
[also build test WARNING on usb/usb-testing v5.12-rc8 next-20210421]
[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/Johan-Hovold/serial-extend-compile-test-coverage/20210421-234950
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
config: x86_64-randconfig-a014-20210421 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d87b9b81ccb95217181ce75515c6c68bbb408ca4)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/c010530fa587261662c6abdb59ade994645dcfa8
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Johan-Hovold/serial-extend-compile-test-coverage/20210421-234950
        git checkout c010530fa587261662c6abdb59ade994645dcfa8
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 

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/serial_txx9.c:987:12: warning: no previous prototype for function 'early_serial_txx9_setup' [-Wmissing-prototypes]
   int __init early_serial_txx9_setup(struct uart_port *port)
              ^
   drivers/tty/serial/serial_txx9.c:987:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int __init early_serial_txx9_setup(struct uart_port *port)
   ^
   static 
   1 warning generated.


vim +/early_serial_txx9_setup +987 drivers/tty/serial/serial_txx9.c

^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16  986  
^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16 @987  int __init early_serial_txx9_setup(struct uart_port *port)
^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16  988  {
^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16  989  	if (port->line >= ARRAY_SIZE(serial_txx9_ports))
^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16  990  		return -ENODEV;
^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16  991  
^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16  992  	serial_txx9_ports[port->line].port = *port;
^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16  993  	serial_txx9_ports[port->line].port.ops = &serial_txx9_pops;
37a6c7d0096bb5 drivers/serial/serial_txx9.c Atsushi Nemoto 2007-10-16  994  	serial_txx9_ports[port->line].port.flags |=
37a6c7d0096bb5 drivers/serial/serial_txx9.c Atsushi Nemoto 2007-10-16  995  		UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16  996  	return 0;
^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16  997  }
^1da177e4c3f41 drivers/serial/serial_txx9.c Linus Torvalds 2005-04-16  998  

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