[intel-lts:5.10/preempt-rt 4654/30000] drivers/video/fbdev/aty/atyfb_base.c:180:6: warning: no previous prototype for function 'aty_st_lcd'

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

Hi Randy,

FYI, the error/warning still remains.

tree:   https://github.com/intel/linux-intel-lts.git 5.10/preempt-rt
head:   3ac1bd25f960eb6f98d69d28d53e3fddd1e6f88a
commit: f11431c81837b0819854ee10da218949d4c7e2f1 [4654/30000] fbdev: atyfb: add stubs for aty_{ld,st}_lcd()
config: i386-randconfig-i015-20230613 (https://download.01.org/0day-ci/archive/20230615/202306150737.Hqwo7Imk-lkp@intel.com/config)
compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a)
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel/linux-intel-lts/commit/f11431c81837b0819854ee10da218949d4c7e2f1
        git remote add intel-lts https://github.com/intel/linux-intel-lts.git
        git fetch --no-tags intel-lts 5.10/preempt-rt
        git checkout f11431c81837b0819854ee10da218949d4c7e2f1
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=i386 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/thunderbolt/ drivers/video/fbdev/aty/

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306150737.Hqwo7Imk-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/video/fbdev/aty/atyfb_base.c:180:6: warning: no previous prototype for function 'aty_st_lcd' [-Wmissing-prototypes]
   void aty_st_lcd(int index, u32 val, const struct atyfb_par *par)
        ^
   drivers/video/fbdev/aty/atyfb_base.c:180:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void aty_st_lcd(int index, u32 val, const struct atyfb_par *par)
   ^
   static 
>> drivers/video/fbdev/aty/atyfb_base.c:183:5: warning: no previous prototype for function 'aty_ld_lcd' [-Wmissing-prototypes]
   u32 aty_ld_lcd(int index, const struct atyfb_par *par)
       ^
   drivers/video/fbdev/aty/atyfb_base.c:183:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   u32 aty_ld_lcd(int index, const struct atyfb_par *par)
   ^
   static 
   2 warnings generated.


vim +/aty_st_lcd +180 drivers/video/fbdev/aty/atyfb_base.c

   163	
   164	u32 aty_ld_lcd(int index, const struct atyfb_par *par)
   165	{
   166		if (M64_HAS(LT_LCD_REGS)) {
   167			return aty_ld_le32(lt_lcd_regs[index], par);
   168		} else {
   169			unsigned long temp;
   170	
   171			/* write addr byte */
   172			temp = aty_ld_le32(LCD_INDEX, par);
   173			aty_st_le32(LCD_INDEX, (temp & ~LCD_INDEX_MASK) | index, par);
   174			/* read the register value */
   175			return aty_ld_le32(LCD_DATA, par);
   176		}
   177	}
   178	#else /* defined(CONFIG_PMAC_BACKLIGHT) || defined(CONFIG_FB_ATY_BACKLIGHT) \
   179		 defined(CONFIG_FB_ATY_GENERIC_LCD) */
 > 180	void aty_st_lcd(int index, u32 val, const struct atyfb_par *par)
   181	{ }
   182	
 > 183	u32 aty_ld_lcd(int index, const struct atyfb_par *par)
   184	{
   185		return 0;
   186	}
   187	#endif /* defined(CONFIG_PMAC_BACKLIGHT) || defined (CONFIG_FB_ATY_GENERIC_LCD) */
   188	

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