[rcu:dev 110/110] softirq.c:undefined reference to `rcu_softirq_qs'

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev
head:   0028a1e4fdbb4263539595da08979d59954d4873
commit: 0028a1e4fdbb4263539595da08979d59954d4873 [110/110] rcu: Apply RCU-bh QSes to RCU-sched and RCU-preempt when safe
config: i386-alldefconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
        git checkout 0028a1e4fdbb4263539595da08979d59954d4873
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   kernel/softirq.o: In function `__do_softirq':
>> softirq.c:(.softirqentry.text+0x1a9): undefined reference to `rcu_softirq_qs'

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