[linux-next:master 2700/2947] mm/userfaultfd.o: warning: objtool: userfaultfd_register_range+0x148: unreachable instruction

[linux-next:master 2700/2947] mm/userfaultfd.o: warning: objtool: userfaultfd_register_range+0x148: unreachable instruction

[kernel test robot]

:::::: 
:::::: Manual check reason: "loongarch: unreachable instruction"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: Linux Memory Management List <linux-mm@kvack.org>
TO: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Linux Memory Management List <linux-mm@kvack.org>
CC: Vlastimil Babka <vbabka@suse.cz>
CC: "Liam R. Howlett" <Liam.Howlett@oracle.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   f524a5e4dfb75b277c9a5ad819ca5f035f490f14
commit: d9e65bcf28d4f9c071a086398ab1c48c590bbe12 [2700/2947] userfaultfd: move core VMA manipulation logic to mm/userfaultfd.c
:::::: branch date: 3 days ago
:::::: commit date: 3 days ago
config: loongarch-randconfig-001-20240804 (https://download.01.org/0day-ci/archive/20240805/202408050641.2r2fDoTL-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240805/202408050641.2r2fDoTL-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202408050641.2r2fDoTL-lkp@intel.com/

All warnings (new ones prefixed by >>):

   mm/userfaultfd.o: warning: objtool: mfill_atomic_copy+0x6c: unreachable instruction
   mm/userfaultfd.o: warning: objtool: mfill_atomic_zeropage+0x64: unreachable instruction
   mm/userfaultfd.o: warning: objtool: mfill_atomic_continue+0x6c: unreachable instruction
   mm/userfaultfd.o: warning: objtool: mfill_atomic_poison+0x68: unreachable instruction
   mm/userfaultfd.o: warning: objtool: mwriteprotect_range+0x94: unreachable instruction
>> mm/userfaultfd.o: warning: objtool: userfaultfd_register_range+0x148: unreachable instruction


objdump-func vmlinux.o userfaultfd_register_range:

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki