[PATCH v8 4/8] drm/fb_dma: Add generic set_scanout_buffer() for drm_panic

[kernel test robot]

Hi Jocelyn,

kernel test robot noticed the following build warnings:

[auto build test WARNING on bfa4437fd3938ae2e186e7664b2db65bb8775670]

url:    https://github.com/intel-lab-lkp/linux/commits/Jocelyn-Falempe/drm-format-helper-Add-drm_fb_blit_from_r1-and-drm_fb_fill/20240227-185901
base:   bfa4437fd3938ae2e186e7664b2db65bb8775670
patch link:    https://lore.kernel.org/r/20240227100459.194478-5-jfalempe%40redhat.com
patch subject: [PATCH v8 4/8] drm/fb_dma: Add generic set_scanout_buffer() for drm_panic
config: arm-defconfig (https://download.01.org/0day-ci/archive/20240229/202402292348.4l5K5ZmN-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240229/202402292348.4l5K5ZmN-lkp@intel.com/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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202402292348.4l5K5ZmN-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/gpu/drm/pl111/pl111_display.c:18:
>> include/drm/drm_fb_dma_helper.h:23:46: warning: declaration of 'struct drm_plane' will not be visible outside of this function [-Wvisibility]
   void drm_panic_gem_set_scanout_buffer(struct drm_plane *plane,
                                                ^
   1 warning generated.


vim +23 include/drm/drm_fb_dma_helper.h

    11	
    12	struct drm_gem_dma_object *drm_fb_dma_get_gem_obj(struct drm_framebuffer *fb,
    13		unsigned int plane);
    14	
    15	dma_addr_t drm_fb_dma_get_gem_addr(struct drm_framebuffer *fb,
    16					   struct drm_plane_state *state,
    17					   unsigned int plane);
    18	
    19	void drm_fb_dma_sync_non_coherent(struct drm_device *drm,
    20					  struct drm_plane_state *old_state,
    21					  struct drm_plane_state *state);
    22	
  > 23	void drm_panic_gem_set_scanout_buffer(struct drm_plane *plane,
    24					     struct drm_framebuffer *fb);
    25	

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