ERROR: modpost: "__ld_r13_to_r20_ret" [lib/zstd/zstd_decompress.ko] undefined!

[kernel test robot]

Hi Nick,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f0b9d8eb98dfee8d00419aa07543bdc2c1a44fb1
commit: 65d1f5507ed2c78c64fce40e44e5574a9419eb09 zstd: Import upstream v1.5.7
date:   10 months ago
config: arc-randconfig-r061-20260107 (https://download.01.org/0day-ci/archive/20260107/202601071032.PQHPKfyf-lkp@xxxxxxxxx/config)
compiler: arc-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260107/202601071032.PQHPKfyf-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/202601071032.PQHPKfyf-lkp@xxxxxxxxx/

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

ERROR: modpost: "__ld_r13_to_r23_ret" [lib/zstd/zstd_decompress.ko] undefined!
ERROR: modpost: "__ld_r13_to_r19_ret" [lib/zstd/zstd_decompress.ko] undefined!
ERROR: modpost: "__st_r13_to_r15" [lib/zstd/zstd_decompress.ko] undefined!
ERROR: modpost: "__st_r13_to_r24" [lib/zstd/zstd_decompress.ko] undefined!
ERROR: modpost: "__st_r13_to_r19" [lib/zstd/zstd_decompress.ko] undefined!
ERROR: modpost: "__st_r13_to_r23" [lib/zstd/zstd_decompress.ko] undefined!
ERROR: modpost: "__ld_r13_to_r24_ret" [lib/zstd/zstd_decompress.ko] undefined!
ERROR: modpost: "__ld_r13_to_r18_ret" [lib/zstd/zstd_decompress.ko] undefined!
>> ERROR: modpost: "__ld_r13_to_r20_ret" [lib/zstd/zstd_decompress.ko] undefined!
>> ERROR: modpost: "__ld_r13_to_r15_ret" [lib/zstd/zstd_decompress.ko] undefined!
WARNING: modpost: suppressed 2 unresolved symbol warnings because there were too many)

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