[kbuild-all] [mark:locking/debug-refcount 2/3] mm/z3fold.o: warning: objtool: z3fold_zpool_malloc()+0x1df: unreachable instruction

CC: linux-kernel(a)vger.kernel.org TO: Mark Rutland <mark.rutland(a)arm.com&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git locking/debug-refcount head: fb4984c339109f2ee2dd0000e7744aab91b974f5 commit: ae5010b75aaeb2f0110399b12099d59044d3b22d [2/3] WIP: kref: use refcount_init() config: x86_64-randconfig-a011-20211216 (https://download.01.org/0day-ci/archive/20211218/202112182105.T58rRsh2-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 4c9e31a4814592bbda7153833e46728dc7b21100) 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/mark/linux.git/commit/?id... git remote add mark https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git git fetch --no-tags mark locking/debug-refcount git checkout ae5010b75aaeb2f0110399b12099d59044d3b22d # 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=x86_64 SHELL=/bin/bash 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 >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org