tree: https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git preview head: e675fabdbbcdb6e32dba688a20fb0bd42e0e2d5d commit: 2b2d6579d0ee25b92d9af10c407c11cb4e3e0afe [46/53] cxl/mem: Add the cxl_mem driver config: i386-randconfig-a013 (https://download.01.org/0day-ci/archive/20220122/202201222155.g7TX2HHO-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 7b3d30728816403d1fd73cc5082e9fb761262bce) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git/commit/?id=2b... git remote add cxl https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git git fetch --no-tags cxl preview git checkout 2b2d6579d0ee25b92d9af10c407c11cb4e3e0afe # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/cxl/core/ 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 >>): void detach_memdev(struct work_struct *work) ^ drivers/cxl/core/memdev.c:222:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void detach_memdev(struct work_struct *work) ^ static 1 warning generated. vim +/detach_memdev +222 drivers/cxl/core/memdev.c 221 223 { 224 struct cxl_memdev *cxlmd; 225 226 cxlmd = container_of(work, typeof(*cxlmd), detach_work); 227 device_release_driver(&cxlmd->dev); 228 put_device(&cxlmd->dev); 229 } 230 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org