vmlinux.o: warning: objtool: amd_iommu_domain_alloc_paging_flags+0x2c3: unreachable instruction

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   0de63bb7d91975e73338300a57c54b93d3cc151c
commit: 082f1bcae8d1b5f76e92e369091176b8d61120ec iommu/amd: Fully decode all combinations of alloc_paging_flags
date:   3 weeks ago
config: x86_64-randconfig-075-20250203 (https://download.01.org/0day-ci/archive/20250204/202502041311.kWm3wyBl-lkp@xxxxxxxxx/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250204/202502041311.kWm3wyBl-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202502041311.kWm3wyBl-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

   vmlinux.o: warning: objtool: ep_poll_callback+0x458: unreachable instruction
>> vmlinux.o: warning: objtool: amd_iommu_domain_alloc_paging_flags+0x2c3: unreachable instruction

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