linux-kernel - ERROR: modpost: "__ld_r13_to_r23_ret" [lib/zstd/zstd

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Message-ID: <202506170440.xI7L5buI-lkp@intel.com>
Date: Tue, 17 Jun 2025 04:31:00 +0800
From: kernel test robot <lkp@...el.com>
To: Nick Terrell <terrelln@...a.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: ERROR: modpost: "__ld_r13_to_r23_ret" [lib/zstd/zstd_decompress.ko]
 undefined!

Hi Nick,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   44a5ab7a7958fbf190ae384b8ef252f23b840c1b
commit: 65d1f5507ed2c78c64fce40e44e5574a9419eb09 zstd: Import upstream v1.5.7
date:   3 months ago
config: arc-randconfig-001-20250617 (https://download.01.org/0day-ci/archive/20250617/202506170440.xI7L5buI-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250617/202506170440.xI7L5buI-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
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506170440.xI7L5buI-lkp@intel.com/

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: "__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