ERROR: modpost: "__delay" [drivers/net/mdio/mdio-cavium.ko] undefined!

[kernel test robot]

Hi Andrew,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   fd0584d220fe285dc45be43eede55df89ad6a3d9
commit: a9770eac511ad82390b9f4a3c1728e078c387ac7 net: mdio: Move MDIO drivers into a new subdirectory
date:   4 years, 4 months ago
config: sh-randconfig-001-20241212 (https://download.01.org/0day-ci/archive/20241228/202412282326.0DSE4HbR-lkp@xxxxxxxxx/config)
compiler: sh4-linux-gcc (GCC) 12.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241228/202412282326.0DSE4HbR-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/202412282326.0DSE4HbR-lkp@xxxxxxxxx/

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

>> ERROR: modpost: "__delay" [drivers/net/mdio/mdio-cavium.ko] undefined!

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