arch/arm/mach-omap1/serial.c:236:12: warning: no previous prototype for 'omap_serial_wakeup_init'

[kernel test robot]

Hi Arnd,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   478a351ce0d69cef2d2bf2a686a09b356b63a66c
commit: 250c1a694ff304e5d69e74ab32755eddcc2b8f65 ARM: pxa: convert to multiplatform
date:   11 months ago
config: arm-randconfig-r033-20230318 (https://download.01.org/0day-ci/archive/20230318/202303181820.fFVSpwKt-lkp@xxxxxxxxx/config)
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=250c1a694ff304e5d69e74ab32755eddcc2b8f65
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 250c1a694ff304e5d69e74ab32755eddcc2b8f65
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash arch/arm/mach-omap1/ drivers/usb/gadget/udc/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202303181820.fFVSpwKt-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> arch/arm/mach-omap1/serial.c:236:12: warning: no previous prototype for 'omap_serial_wakeup_init' [-Wmissing-prototypes]
     236 | int __init omap_serial_wakeup_init(void)
         |            ^~~~~~~~~~~~~~~~~~~~~~~
--
   drivers/usb/gadget/udc/omap_udc.c: In function 'omap_udc_pio_irq':
>> drivers/usb/gadget/udc/omap_udc.c:1915:37: warning: variable 'stat' set but not used [-Wunused-but-set-variable]
    1915 |                                 int stat;
         |                                     ^~~~
   drivers/usb/gadget/udc/omap_udc.c: At top level:
   drivers/usb/gadget/udc/omap_udc.c:110:19: warning: 'driver_desc' defined but not used [-Wunused-const-variable=]
     110 | static const char driver_desc[] = DRIVER_DESC;
         |                   ^~~~~~~~~~~


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@xxxxxxxxxx>
:::::: CC: Shawn Guo <shawn.guo@xxxxxxxxxx>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests