tree: https://github.com/thierryreding/linux for-5.13/work head: 009ea3ee74a12859073a37d2ef800fa154ff7705 commit: 1997b739eee70f5f7a656a10c432ee395020f12a [21/49] drm/tegra: Implement new UAPI config: arm-randconfig-r011-20210318 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project fcc1ce00931751ac02498986feb37744e9ace8de) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/thierryreding/linux/commit/1997b739eee70f5f7a656a10c43... git remote add thierryreding https://github.com/thierryreding/linux git fetch --no-tags thierryreding for-5.13/work git checkout 1997b739eee70f5f7a656a10c432ee395020f12a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): int close_channel_ctx(int id, void *p, void *data) ^ drivers/gpu/drm/tegra/uapi/uapi.c:62:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int close_channel_ctx(int id, void *p, void *data) ^ static 1 warning generated. vim +/close_channel_ctx +62 drivers/gpu/drm/tegra/uapi/uapi.c 61 63 { 64 struct tegra_drm_channel_ctx *ctx = p; 65 66 tegra_drm_channel_ctx_close(ctx); 67 68 return 0; 69 } 70 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org