WARNING: modpost: "cmpxchg8b_emu" [fs/btrfs/btrfs.ko] has no CRC!

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   2ba9f676d0a2e408aef14d679984c26373bf37b7
commit: 1020443840569535f6025a855958f07ea3eebf71 btrfs: make the extent map shrinker run asynchronously as a work queue job
date:   3 weeks ago
config: um-randconfig-r053-20241130 (https://download.01.org/0day-ci/archive/20241130/202411302109.AIAUz8Er-lkp@xxxxxxxxx/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241130/202411302109.AIAUz8Er-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/202411302109.AIAUz8Er-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>, old ones prefixed by <<):

WARNING: modpost: EXPORT symbol "cmpxchg8b_emu" [vmlinux] version generation failed, symbol will not be versioned.
Is "cmpxchg8b_emu" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "csum_partial" [vmlinux] version generation failed, symbol will not be versioned.
Is "csum_partial" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "csum_partial_copy_generic" [vmlinux] version generation failed, symbol will not be versioned.
Is "csum_partial_copy_generic" prototyped in <asm/asm-prototypes.h>?
>> WARNING: modpost: "cmpxchg8b_emu" [fs/btrfs/btrfs.ko] has no CRC!
WARNING: modpost: "cmpxchg8b_emu" [lib/test_lockup.ko] has no CRC!
WARNING: modpost: "csum_partial" [net/batman-adv/batman-adv.ko] has no CRC!

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