tree: git://anongit.freedesktop.org/tegra/linux.git drm/tegra/for-next head: b19502d1a683c11f6f2c92ad63c61288b0fbe1a1 commit: ad0529424defbbe0b6a154cc100e82c1a9f91400 [1/14] gpu: host1x: Add DMA fence implementation config: arm64-randconfig-r025-20210714 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 0e49c54a8cbd3e779e5526a5888c683c01cc3c50) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu git remote add tegra-drm git://anongit.freedesktop.org/tegra/linux.git git fetch --no-tags tegra-drm drm/tegra/for-next git checkout ad0529424defbbe0b6a154cc100e82c1a9f91400 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 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 host1x_fence_create_fd(struct host1x_syncpt *sp, u32 threshold) ^ drivers/gpu/host1x/fence.c:168:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int host1x_fence_create_fd(struct host1x_syncpt *sp, u32 threshold) ^ static 1 warning generated. vim +/host1x_fence_create_fd +168 drivers/gpu/host1x/fence.c 167 169 { 170 struct sync_file *file; 171 struct dma_fence *f; 172 int fd; 173 174 f = host1x_fence_create(sp, threshold); 175 if (IS_ERR(f)) 176 return PTR_ERR(f); 177 178 fd = get_unused_fd_flags(O_CLOEXEC); 179 if (fd < 0) { 180 dma_fence_put(f); 181 return fd; 182 } 183 184 file = sync_file_create(f); 185 dma_fence_put(f); 186 if (!file) 187 return -ENOMEM; 188 189 fd_install(fd, file->file); 190 191 return fd; 192 } 193 EXPORT_SYMBOL(host1x_fence_create_fd); 194 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org