Re: [PATCH 4/5] media: vcodec: Implement manual request completion

[kernel test robot]

Hi Sebastian,

kernel test robot noticed the following build warnings:

[auto build test WARNING on f2151613e040973c868d28c8b00885dfab69eb75]

url:    https://github.com/intel-lab-lkp/linux/commits/Sebastian-Fricke/media-mc-add-manual-request-completion/20250314-213005
base:   f2151613e040973c868d28c8b00885dfab69eb75
patch link:    https://lore.kernel.org/r/20250314-sebastianfricke-vcodec_manual_request_completion_with_state_machine-v1-4-5e277a3d695b%40collabora.com
patch subject: [PATCH 4/5] media: vcodec: Implement manual request completion
config: x86_64-buildonly-randconfig-003-20250315 (https://download.01.org/0day-ci/archive/20250315/202503151605.1d1dDLuM-lkp@xxxxxxxxx/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
rustc: rustc 1.78.0 (9b00956e5 2024-04-29)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250315/202503151605.1d1dDLuM-lkp@xxxxxxxxx/reproduce)

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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202503151605.1d1dDLuM-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c:29:13: warning: no previous prototype for function 'state_to_str' [-Wmissing-prototypes]
      29 | const char *state_to_str(enum mtk_request_state state)
         |             ^
   drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c:29:7: note: declare 'static' if the function is not intended to be used outside of this translation unit
      29 | const char *state_to_str(enum mtk_request_state state)
         |       ^
         | static 
   1 warning generated.


vim +/state_to_str +29 drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c

    28	
  > 29	const char *state_to_str(enum mtk_request_state state)
    30	{
    31		switch (state) {
    32		case MTK_REQUEST_RECEIVED:
    33			return "RECEIVED";
    34		case MTK_REQUEST_LAT_DONE:
    35			return "LAT_DONE";
    36		case MTK_REQUEST_CORE_DONE:
    37			return "CORE_DONE";
    38		default:
    39			return "UNKNOWN";
    40		}
    41	}
    42	

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