[PATCH v5 5/6] drm/ast: Add drm_panic support

[kernel test robot]

Hi Jocelyn,

kernel test robot noticed the following build warnings:

[auto build test WARNING on ffc253263a1375a65fa6c9f62a893e9767fbebfa]

url:    https://github.com/intel-lab-lkp/linux/commits/Jocelyn-Falempe/drm-format-helper-Add-drm_fb_blit_from_r1-and-drm_fb_fill/20231103-225824
base:   ffc253263a1375a65fa6c9f62a893e9767fbebfa
patch link:    https://lore.kernel.org/r/20231103145526.628138-6-jfalempe%40redhat.com
patch subject: [PATCH v5 5/6] drm/ast: Add drm_panic support
config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20231104/202311041116.Madu45VI-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231104/202311041116.Madu45VI-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/202311041116.Madu45VI-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/gpu/drm/ast/ast_i2c.c:27:
>> drivers/gpu/drm/ast/ast_drv.h:508:14: warning: declaration of 'struct drm_scanout_buffer' will not be visible outside of this function [-Wvisibility]
                              struct drm_scanout_buffer *sb);
                                     ^
   1 warning generated.


vim +508 drivers/gpu/drm/ast/ast_drv.h

   506	
   507	int ast_get_scanout_buffer(struct drm_device *dev,
 > 508				   struct drm_scanout_buffer *sb);
   509	

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