tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   83bdc7275e6206f560d247be856bceba3e1ed8f2
commit: cd33c830448baf7b1e94da72eca069e3e1d050c9 media: rkvdec: Add the rkvdec driver
date:   3 months ago
config: x86_64-randconfig-r016-20200730 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 6700f4b9fe6321ef704efa4890af5bc351a124f0)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        git checkout cd33c830448baf7b1e94da72eca069e3e1d050c9
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> drivers/staging/media/rkvdec/rkvdec.c:967:34: warning: unused variable 'of_rkvdec_match' [-Wunused-const-variable]
   static const struct of_device_id of_rkvdec_match[] = {
                                    ^
   1 warning generated.

vim +/of_rkvdec_match +967 drivers/staging/media/rkvdec/rkvdec.c

   966	
 > 967	static const struct of_device_id of_rkvdec_match[] = {
   968		{ .compatible = "rockchip,rk3399-vdec" },
   969		{ /* sentinel */ }
   970	};
   971	MODULE_DEVICE_TABLE(of, of_rkvdec_match);
   972	

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