ERROR: modpost: "__st_r13_to_r15" [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:   e9825d1c79570b4c11259e826b3f7c1511544a85
commit: 65d1f5507ed2c78c64fce40e44e5574a9419eb09 zstd: Import upstream v1.5.7
date:   1 year ago
config: arc-randconfig-r073-20260319 (https://download.01.org/0day-ci/archive/20260320/202603200328.y02iDyFf-lkp@xxxxxxxxx/config)
compiler: arc-linux-gcc (GCC) 11.5.0
smatch: v0.5.0-9004-gb810ac53
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260320/202603200328.y02iDyFf-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/202603200328.y02iDyFf-lkp@xxxxxxxxx/

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

WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fpga/tests/fpga-mgr-test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fpga/tests/fpga-bridge-test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fpga/tests/fpga-region-test.o
ERROR: modpost: "__ld_r13_to_r23_ret" [lib/zstd/zstd_decompress.ko] undefined!
ERROR: modpost: "__st_r13_to_r22" [lib/zstd/zstd_decompress.ko] undefined!
ERROR: modpost: "__ld_r13_to_r19_ret" [lib/zstd/zstd_decompress.ko] undefined!
ERROR: modpost: "__ld_r13_to_r22_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!
WARNING: modpost: suppressed 4 unresolved symbol warnings because there were too many)

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