[linux-next:master 2105/11360] arch/arm/mach-omap1/serial.c:236:12: warning: no previous prototype for function 'omap_serial_wakeup_init'

[linux-next:master 2105/11360] arch/arm/mach-omap1/serial.c:236:12: warning: no previous prototype for function 'omap_serial_wakeup_init'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   187b9ac8c348383f7f36c8413d73ad89e9b1e90a
commit: 8c1fb11b8a77dc489a8ef6d96c38c1297b629d06 [2105/11360] ARM: s3c: enable s3c24xx multiplatform support
config: arm-buildonly-randconfig-r004-20220512 (https://download.01.org/0day-ci/archive/20220513/202205131303.oqcXJ1Rl-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 18dd123c56754edf62c7042dcf23185c3727610f)
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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=8c1fb11b8a77dc489a8ef6d96c38c1297b629d06
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 8c1fb11b8a77dc489a8ef6d96c38c1297b629d06
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

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 >>):

>> arch/arm/mach-omap1/serial.c:236:12: warning: no previous prototype for function 'omap_serial_wakeup_init' [-Wmissing-prototypes]
   int __init omap_serial_wakeup_init(void)
              ^
   arch/arm/mach-omap1/serial.c:236:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int __init omap_serial_wakeup_init(void)
   ^
   static 
   1 warning generated.


vim +/omap_serial_wakeup_init +236 arch/arm/mach-omap1/serial.c

7c38cf021b42a4 Tony Lindgren 2005-09-08  235  
82c3bd03535f15 Shawn Guo     2012-04-26 @236  int __init omap_serial_wakeup_init(void)
7c38cf021b42a4 Tony Lindgren 2005-09-08  237  {
7c38cf021b42a4 Tony Lindgren 2005-09-08  238  	if (!cpu_is_omap16xx())
7c38cf021b42a4 Tony Lindgren 2005-09-08  239  		return 0;
7c38cf021b42a4 Tony Lindgren 2005-09-08  240  
7c38cf021b42a4 Tony Lindgren 2005-09-08  241  	if (uart1_ck != NULL)
7c38cf021b42a4 Tony Lindgren 2005-09-08  242  		omap_serial_set_port_wakeup(37);
7c38cf021b42a4 Tony Lindgren 2005-09-08  243  	if (uart2_ck != NULL)
7c38cf021b42a4 Tony Lindgren 2005-09-08  244  		omap_serial_set_port_wakeup(18);
7c38cf021b42a4 Tony Lindgren 2005-09-08  245  	if (uart3_ck != NULL)
7c38cf021b42a4 Tony Lindgren 2005-09-08  246  		omap_serial_set_port_wakeup(49);
7c38cf021b42a4 Tony Lindgren 2005-09-08  247  
7c38cf021b42a4 Tony Lindgren 2005-09-08  248  	return 0;
7c38cf021b42a4 Tony Lindgren 2005-09-08  249  }
7c38cf021b42a4 Tony Lindgren 2005-09-08  250  

:::::: The code at line 236 was first introduced by commit
:::::: 82c3bd03535f1571426fdd19b7d832f76b7ac85e ARM: omap1: use machine specific hook for late init

:::::: TO: Shawn Guo <shawn.guo@linaro.org>
:::::: CC: Shawn Guo <shawn.guo@linaro.org>

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