mm/migrate.o: warning: objtool: try_to_map_unused_to_zeropage+0x6c: unreachable instruction

mm/migrate.o: warning: objtool: try_to_map_unused_to_zeropage+0x6c: 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: Yu Zhao <yuzhao@google.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Linux Memory Management List <linux-mm@kvack.org>
CC: Usama Arif <usamaarif642@gmail.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5b7c893ed5ed0fc1cbe28c0e3296a6fb45698486
commit: b1f202060afeb7fcb98473929d26fd3d2093b067 mm: remap unused subpages to shared zeropage when splitting isolated thp
date:   4 weeks ago
:::::: branch date: 3 hours ago
:::::: commit date: 4 weeks ago
config: loongarch-randconfig-001-20240804 (https://download.01.org/0day-ci/archive/20241009/202410090405.it0WJsdB-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/20241009/202410090405.it0WJsdB-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/202410090405.it0WJsdB-lkp@intel.com/

All warnings (new ones prefixed by >>):

   mm/migrate.o: warning: objtool: page_ref_unfreeze+0x84: unreachable instruction
>> mm/migrate.o: warning: objtool: try_to_map_unused_to_zeropage+0x6c: unreachable instruction
   mm/migrate.o: warning: objtool: move_to_new_folio+0x64: unreachable instruction


objdump-func vmlinux.o try_to_map_unused_to_zeropage:

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