[asahilinux:bits/090-spi-hid 11/11] drivers/hid/spi-hid/spi-hid-apple-core.c:259:22: warning: no previous prototype for function 'spihid_get_data'

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/AsahiLinux/linux bits/090-spi-hid
head:   11b586fd5cff82ad72e9a281c0deb27959d16857
commit: 11b586fd5cff82ad72e9a281c0deb27959d16857 [11/11] WIP: HID: transport: spi: add Apple SPI transport
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20220503/202205030410.6Owech62-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 09325d36061e42b495d1f4c7e933e260eac260ed)
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 arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/AsahiLinux/linux/commit/11b586fd5cff82ad72e9a281c0deb27959d16857
        git remote add asahilinux https://github.com/AsahiLinux/linux
        git fetch --no-tags asahilinux bits/090-spi-hid
        git checkout 11b586fd5cff82ad72e9a281c0deb27959d16857
        # 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=arm64 SHELL=/bin/bash drivers/dma/ drivers/hid/spi-hid/

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/hid/spi-hid/spi-hid-apple-core.c:259:22: warning: no previous prototype for function 'spihid_get_data' [-Wmissing-prototypes]
   struct spihid_apple *spihid_get_data(struct spihid_interface *idev)
                        ^
   drivers/hid/spi-hid/spi-hid-apple-core.c:259:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct spihid_apple *spihid_get_data(struct spihid_interface *idev)
   ^
   static 
   drivers/hid/spi-hid/spi-hid-apple-core.c:56:17: warning: variable 'spi_hid_apple_status_ok' is not needed and will not be emitted [-Wunneeded-internal-declaration]
   static const u8 spi_hid_apple_status_ok[4] = { 0xac, 0x27, 0x68, 0xd5 };
                   ^
   2 warnings generated.
--
>> drivers/hid/spi-hid/spi-hid-apple-of.c:24:5: warning: no previous prototype for function 'spihid_apple_of_power_on' [-Wmissing-prototypes]
   int spihid_apple_of_power_on(struct spihid_apple_ops *ops)
       ^
   drivers/hid/spi-hid/spi-hid-apple-of.c:24:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int spihid_apple_of_power_on(struct spihid_apple_ops *ops)
   ^
   static 
>> drivers/hid/spi-hid/spi-hid-apple-of.c:40:5: warning: no previous prototype for function 'spihid_apple_of_power_off' [-Wmissing-prototypes]
   int spihid_apple_of_power_off(struct spihid_apple_ops *ops)
       ^
   drivers/hid/spi-hid/spi-hid-apple-of.c:40:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int spihid_apple_of_power_off(struct spihid_apple_ops *ops)
   ^
   static 
>> drivers/hid/spi-hid/spi-hid-apple-of.c:50:5: warning: no previous prototype for function 'spihid_apple_of_enable_irq' [-Wmissing-prototypes]
   int spihid_apple_of_enable_irq(struct spihid_apple_ops *ops)
       ^
   drivers/hid/spi-hid/spi-hid-apple-of.c:50:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int spihid_apple_of_enable_irq(struct spihid_apple_ops *ops)
   ^
   static 
>> drivers/hid/spi-hid/spi-hid-apple-of.c:59:5: warning: no previous prototype for function 'spihid_apple_of_disable_irq' [-Wmissing-prototypes]
   int spihid_apple_of_disable_irq(struct spihid_apple_ops *ops)
       ^
   drivers/hid/spi-hid/spi-hid-apple-of.c:59:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int spihid_apple_of_disable_irq(struct spihid_apple_ops *ops)
   ^
   static 
   4 warnings generated.


vim +/spihid_get_data +259 drivers/hid/spi-hid/spi-hid-apple-core.c

   258	
 > 259	struct spihid_apple *spihid_get_data(struct spihid_interface *idev)
   260	{
   261		switch (idev->id) {
   262		case SPIHID_DEVICE_ID_KBD:
   263			return container_of(idev, struct spihid_apple, kbd);
   264		case SPIHID_DEVICE_ID_TP:
   265			return container_of(idev, struct spihid_apple, tp);
   266		default:
   267			return NULL;
   268		}
   269	}
   270	

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