[kbuild-all] [linux-next:master 8390/8476] lib/iov_iter.o: warning: objtool: csum_and_copy_from_iter()+0x338: unreachable instruction

CC: Linux Memory Management List <linux-mm(a)kvack.org&gt; TO: "Paul E. McKenney" <paulmck(a)kernel.org&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: b0795f0f47d7425836ff90b96aea3bd5b73505b2 commit: cca935aa8c5be48bf44b6a05edfe9adcb556a34e [8390/8476] Merge remote-tracking branch 'rcu/rcu/next' config: x86_64-randconfig-a016-20210608 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d2012d965d60c3258b3a69d024491698f8aec386) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout cca935aa8c5be48bf44b6a05edfe9adcb556a34e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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