[kbuild-all] [linux-next:master 1946/3296] mm/mmap.o: warning: objtool: mmap_region()+0x1047: unreachable instruction

CC: Linux Memory Management List <linux-mm(a)kvack.org&gt; TO: Miklos Szeredi <mszeredi(a)redhat.com&gt; CC: "Christian König" <christian.koenig(a)amd.com&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 90d856e71443a2fcacca8e7539bac44d9cb3f7ab commit: 8fc5ae26d8287e0cb33188c849a26b05c6411bab [1946/3296] ovl: fix mmap denywrite config: x86_64-randconfig-r004-20210723 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9625ca5b602616b2f5584e8a49ba93c52c141e40) 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 8fc5ae26d8287e0cb33188c849a26b05c6411bab # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross 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