[rcu:rcu/next 33/36] ERROR: modpost: "rcu_read_unlock_longwait" undefined!

From: kernel test robot
Date: Tue Mar 16 2021 - 19:19:42 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
head: 9035ae87fcb36d2a7c8872e1cc0a46c0c5b619a8
commit: bd6ae31d1b1f22ab7ff8376b416f09d93d9ef75d [33/36] rcutorture: Add the ability to torture RCU longsleep
config: x86_64-randconfig-r015-20210316 (attached as .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/paulmck/linux-rcu.git/commit/?id=bd6ae31d1b1f22ab7ff8376b416f09d93d9ef75d
git remote add rcu https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
git fetch --no-tags rcu rcu/next
git checkout bd6ae31d1b1f22ab7ff8376b416f09d93d9ef75d
# 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@xxxxxxxxx>

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

>> ERROR: modpost: "rcu_read_unlock_longwait" [kernel/rcu/rcutorture.ko] undefined!
>> ERROR: modpost: "rcu_read_lock_longwait" [kernel/rcu/rcutorture.ko] undefined!
>> ERROR: modpost: "rcu_read_lock_longwait_held" [kernel/rcu/rcutorture.ko] undefined!

0-DAY CI Kernel Test Service, Intel Corporation

Attachment: .config.gz
Description: application/gzip