[kbuild-all] net/mptcp/protocol.o: warning: objtool: mptcp_hash()+0x7: unreachable instruction

CC: linux-kernel(a)vger.kernel.org TO: Paolo Abeni <pabeni(a)redhat.com&gt; CC: Mat Martineau <mathew.j.martineau(a)linux.intel.com&gt; Hi Paolo, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 2b14864acbaaf03d9c01982e243a84632524c3ac commit: 33d41c9cd74c56643a710810703b6bce6eb25efa mptcp: more accurate timeout date: 4 months ago config: x86_64-randconfig-a011-20211216 (https://download.01.org/0day-ci/archive/20211217/202112170523.cmGf0o7m-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dd245bab9fbb364faa1581e4f92ba3119a872fba) 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/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 33d41c9cd74c56643a710810703b6bce6eb25efa # 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 net/ 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