linux-kernel - Re: [rcu:dev 110/110] softirq.c:undefined reference to `rcu_softirq

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Date:   Thu, 28 Jun 2018 16:26:58 -0700
From:   "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:     kbuild test robot <lkp@...el.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: Re: [rcu:dev 110/110] softirq.c:undefined reference to
 `rcu_softirq_qs'

On Fri, Jun 29, 2018 at 06:46:25AM +0800, kbuild test robot wrote:
> 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'

Oops, need to add !SMP support -- will do!

							Thanx, Paul