tree:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
head:   28f3fbf3ad9cc809521c7a308e29dfc27c445730
commit: 4b569ded09fdadb0c14f797c8dae4e8bc4bbad9f [940/958] drm/nouveau/acr/ga102: initial support
config: s390-allyesconfig
compiler: s390-linux-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
        git remote add drm-tip git://anongit.freedesktop.org/drm/drm-tip
        git fetch --no-tags drm-tip drm-tip
        git checkout 4b569ded09fdadb0c14f797c8dae4e8bc4bbad9f
        # 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=s390 SHELL=/bin/bash drivers/gpu/drm/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/nouveau/nvkm/nvfw/acr.c:49:1: warning: no previous prototype for 'wpr_generic_header_dump' [-Wmissing-prototypes]
      49 | wpr_generic_header_dump(struct nvkm_subdev *subdev, const struct wpr_generic_header *hdr)
         | ^~~~~~~~~~~~~~~~~~~~~~~
--
   drivers/gpu/drm/nouveau/nvkm/subdev/acr/lsfw.c: In function 'nvkm_acr_lsfw_load_sig_image_desc_v2':
>> drivers/gpu/drm/nouveau/nvkm/subdev/acr/lsfw.c:221:21: warning: variable 'loc' set but not used [-Wunused-but-set-variable]
     221 |                 u32 loc, sig, cnt, *meta;
         |                     ^~~


vim +/wpr_generic_header_dump +49 drivers/gpu/drm/nouveau/nvkm/nvfw/acr.c

    47	
    48	void
  > 49	wpr_generic_header_dump(struct nvkm_subdev *subdev, const struct wpr_generic_header *hdr)
    50	{
    51		nvkm_debug(subdev, "wprGenericHeader\n");
    52		nvkm_debug(subdev, "\tidentifier : %04x\n", hdr->identifier);
    53		nvkm_debug(subdev, "\tversion    : %04x\n", hdr->version);
    54		nvkm_debug(subdev, "\tsize       : %08x\n", hdr->size);
    55	}
    56	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp