ERROR: modpost: "crc16" [drivers/ptp/ptp_ocp.ko] undefined!

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   e0dccc3b76fb35bb257b4118367a883073d7390e
commit: 3c3673bde50c31d1f5ab0b39e9eeb555285786bb ptp: ocp: Add firmware header checks
date:   9 weeks ago
config: csky-buildonly-randconfig-r003-20220724 (https://download.01.org/0day-ci/archive/20220727/202207270138.suzGpzQF-lkp@xxxxxxxxx/config)
compiler: csky-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c3673bde50c31d1f5ab0b39e9eeb555285786bb
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 3c3673bde50c31d1f5ab0b39e9eeb555285786bb
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=csky SHELL=/bin/bash

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

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

>> ERROR: modpost: "crc16" [drivers/ptp/ptp_ocp.ko] undefined!

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp