ERROR: modpost: "iwl_mei_is_connected" [drivers/net/wireless/intel/iwlwifi/iwlwifi.ko] undefined!

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   cfb92440ee71adcc2105b0890bb01ac3cddb8507
commit: 977df8bd5844c9370c26a9477418165b870da27c iwlwifi: work around reverse dependency on MEI
date:   3 months ago
config: x86_64-randconfig-c002-20220221 (https://download.01.org/0day-ci/archive/20220222/202202220159.LV6Fd9SI-lkp@xxxxxxxxx/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=977df8bd5844c9370c26a9477418165b870da27c
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 977df8bd5844c9370c26a9477418165b870da27c
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

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

>> ERROR: modpost: "iwl_mei_is_connected" [drivers/net/wireless/intel/iwlwifi/iwlwifi.ko] undefined!

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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx