drivers/media/platform/exynos4-is/fimc-isp-video.h:35:6: warning: no previous prototype for 'fimc_isp_video_device_unregister'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4b6c093e21d36bede0fd88fd0aeb3b03647260e4
commit: bbd7ffdbef6888459f301c5889f3b14ada38b913 clk: Allow the common clk framework to be selectable
date:   3 months ago
config: ia64-randconfig-r033-20200816 (attached as .config)
compiler: ia64-linux-gcc (GCC) 9.3.0
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 checkout bbd7ffdbef6888459f301c5889f3b14ada38b913
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

   In file included from drivers/media/platform/exynos4-is/fimc-isp.c:25:
>> drivers/media/platform/exynos4-is/fimc-isp-video.h:35:6: warning: no previous prototype for 'fimc_isp_video_device_unregister' [-Wmissing-prototypes]
      35 | void fimc_isp_video_device_unregister(struct fimc_isp *isp,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bbd7ffdbef6888459f301c5889f3b14ada38b913
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout bbd7ffdbef6888459f301c5889f3b14ada38b913
vim +/fimc_isp_video_device_unregister +35 drivers/media/platform/exynos4-is/fimc-isp-video.h

34947b8aebe3f2 Sylwester Nawrocki 2013-12-20  34  
34947b8aebe3f2 Sylwester Nawrocki 2013-12-20 @35  void fimc_isp_video_device_unregister(struct fimc_isp *isp,
34947b8aebe3f2 Sylwester Nawrocki 2013-12-20  36  				enum v4l2_buf_type type)
34947b8aebe3f2 Sylwester Nawrocki 2013-12-20  37  {
34947b8aebe3f2 Sylwester Nawrocki 2013-12-20  38  }
34947b8aebe3f2 Sylwester Nawrocki 2013-12-20  39  #endif /* !CONFIG_VIDEO_EXYNOS4_ISP_DMA_CAPTURE */
34947b8aebe3f2 Sylwester Nawrocki 2013-12-20  40  

:::::: The code at line 35 was first introduced by commit
:::::: 34947b8aebe3f2d4eceb65fceafa92bf8dc97d96 [media] exynos4-is: Add the FIMC-IS ISP capture DMA driver

:::::: TO: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
:::::: CC: Mauro Carvalho Chehab <m.chehab@xxxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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