mm/memory.o: warning: objtool: follow_pfnmap_start+0xe8: unreachable instruction

mm/memory.o: warning: objtool: follow_pfnmap_start+0xe8: unreachable instruction

[kernel test robot]

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

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Peter Xu <peterx@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/torvalds/linux.git master
head:   75b607fab38d149f232f01eae5e6392b394dd659
commit: 6da8e9634bb7e3fdad9ae0e4db873a05036c4343 mm: new follow_pfnmap API
date:   3 weeks ago
:::::: branch date: 7 hours ago
:::::: commit date: 3 weeks ago
config: loongarch-randconfig-001-20240804 (https://download.01.org/0day-ci/archive/20241009/202410091050.sS30ViLG-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 13.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241009/202410091050.sS30ViLG-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/202410091050.sS30ViLG-lkp@intel.com/

All warnings (new ones prefixed by >>):

   mm/memory.o: warning: objtool: pfn_swap_entry_folio+0x44: unreachable instruction
   mm/memory.o: warning: objtool: pte_alloc_one_noprof.isra.0+0x58: unreachable instruction
>> mm/memory.o: warning: objtool: follow_pfnmap_start+0xe8: unreachable instruction
   mm/memory.o: warning: objtool: wp_page_reuse+0x50: unreachable instruction
   mm/memory.o: warning: objtool: vm_insert_page+0xac: unreachable instruction
   mm/memory.o: warning: objtool: vmf_insert_pfn_prot+0x60: unreachable instruction
   mm/memory.o: warning: objtool: vm_insert_pages+0xd4: unreachable instruction
   mm/memory.o: warning: objtool: remap_pfn_range_notrack+0x110: unreachable instruction


objdump-func vmlinux.o follow_pfnmap_start:

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