linux-kernel - Re: linux-next: build failure after merge of the rcu tree

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Message-ID: <cc4ab028-cad3-413b-8360-ea34f6914ec7@paulmck-laptop>
Date:   Thu, 18 May 2023 19:12:52 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the rcu tree

On Fri, May 19, 2023 at 10:59:50AM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the rcu tree, today's linux-next build (x86_64 allmodconfig)
> failed like this:
> 
> kernel/rcu/rcuscale.c:340:27: error: 'get_rcu_tasks_trace_gp_kthread' undeclared here (not in a function); did you mean 'show_rcu_tasks_trace_gp_kthread'?
>   340 |         .rso_gp_kthread = get_rcu_tasks_trace_gp_kthread,
>       |                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>       |                           show_rcu_tasks_trace_gp_kthread
> 
> Caused by commit
> 
>   9bb839a83e1b ("rcuscale: Measure grace-period kthread CPU time")
> 
> CONFIG_RCU_SCALE_TEST=m
> 
> I have used the rcu tree from next-20230518 for today.

Huh.  Modules and #ifdefs trip me up again.  Will fix, and thank you
for catching it!

							Thanx, Paul