[linux-next:master 2284/3296] mm/debug_vm_pgtable.o: warning: objtool: pte_protnone_tests()+0x79: unreachable instruction

[linux-next:master 2284/3296] mm/debug_vm_pgtable.o: warning: objtool: pte_protnone_tests()+0x79: unreachable instruction

[kernel test robot]

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CC: Linux Memory Management List <linux-mm@kvack.org>
TO: Gavin Shan <gshan@redhat.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Linux Memory Management List <linux-mm@kvack.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   90d856e71443a2fcacca8e7539bac44d9cb3f7ab
commit: fb6c79d1fb3a74fc7bc8cced28f81da35fe95e52 [2284/3296] mm/debug_vm_pgtable: use struct pgtable_debug_args in protnone and devmap tests
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/commit/?id=fb6c79d1fb3a74fc7bc8cced28f81da35fe95e52
        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 fb6c79d1fb3a74fc7bc8cced28f81da35fe95e52
        # 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@intel.com>

All warnings (new ones prefixed by >>):

>> mm/debug_vm_pgtable.o: warning: objtool: pte_protnone_tests()+0x79: unreachable instruction

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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