tree:   https://github.com/bvanassche/linux deadline-scheduler
head:   2fac4f8bcb5ba758cb6e49b0089a2580985183e1
commit: 2fac4f8bcb5ba758cb6e49b0089a2580985183e1 [9/9] block/mq-deadline: Add cgroup support
config: x86_64-randconfig-a004-20210526 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/bvanassche/linux/commit/2fac4f8bcb5ba758cb6e49b0089a2580985183e1
        git remote add bvanassche https://github.com/bvanassche/linux
        git fetch --no-tags bvanassche deadline-scheduler
        git checkout 2fac4f8bcb5ba758cb6e49b0089a2580985183e1
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

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

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

ERROR: modpost: missing MODULE_LICENSE() in block/mq-deadline-cgroup.o
>> ERROR: modpost: "nocg_inserted" [block/mq-deadline-cgroup.ko] undefined!
>> ERROR: modpost: "dd_blkcg_exit" [block/mq-deadline.ko] undefined!
>> ERROR: modpost: "dd_blkcg_init" [block/mq-deadline.ko] undefined!
>> ERROR: modpost: "dd_blkcg_from_bio" [block/mq-deadline.ko] undefined!
>> ERROR: modpost: "dd_activate_policy" [block/mq-deadline.ko] undefined!
>> ERROR: modpost: "dd_deactivate_policy" [block/mq-deadline.ko] undefined!

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