mm/gup.o: warning: objtool: follow_pmd_mask.constprop.0.isra.0+0x138: unreachable instruction

mm/gup.o: warning: objtool: follow_pmd_mask.constprop.0.isra.0+0x138: 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: "Kiryl Shutsemau (Meta)" <kas@kernel.org>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Linux Memory Management List <linux-mm@kvack.org>

Hi Kiryl,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   7b63ef2d55f24519e7e9e5f4d15dbea03f126e40
commit: c6f11553c067d7d9ed2dcffe1e01780441d4e6e2 mm: decouple protnone helpers from CONFIG_NUMA_BALANCING
date:   9 weeks ago
:::::: branch date: 11 hours ago
:::::: commit date: 9 weeks ago
config: loongarch-randconfig-r2105-20261007 (https://download.01.org/0day-ci/archive/20261008/202610080322.A5EdN1H1-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261008/202610080322.A5EdN1H1-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
| Fixes: c6f11553c067 ("mm: decouple protnone helpers from CONFIG_NUMA_BALANCING")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202610080322.A5EdN1H1-lkp@intel.com/

All warnings (new ones prefixed by >>):

   mm/gup.o: warning: objtool: gup_fast_pgd_range+0x1a8: unreachable instruction
>> mm/gup.o: warning: objtool: follow_pmd_mask.constprop.0.isra.0+0x138: unreachable instruction
   mm/gup.o: warning: objtool: __get_user_pages+0x234: unreachable instruction

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