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

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Message-ID: <20210422163646.GG975577@paulmck-ThinkPad-P17-Gen-1>
Date:   Thu, 22 Apr 2021 09:36:46 -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 Thu, Apr 22, 2021 at 02:10:16PM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the rcu tree, today's linux-next build (arm
> multi_v7_defconfig) failed like this:
> 
> In file included from kernel/rcu/update.c:584:
> kernel/rcu/tasks.h:1404:20: error: static declaration of 'show_rcu_tasks_gp_kthreads' follows non-static declaration
>  1404 | static inline void show_rcu_tasks_gp_kthreads(void) {}
>       |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~
> In file included from kernel/rcu/update.c:49:
> kernel/rcu/rcu.h:440:6: note: previous declaration of 'show_rcu_tasks_gp_kthreads' was here
>   440 | void show_rcu_tasks_gp_kthreads(void);
>       |      ^~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> Caused by commit
> 
>   4bf02dd6048d ("tasks-rcu: Make show_rcu_tasks_gp_kthreads() be static inline")
> 
> I have used the rcu tree from next-20210421 for today.

Well, that is one commit that isn't going into the upcoming merge window!

I have (allegedly) fixed it with attribution, but also moved it out of
my -next pile.  I will update rcu/next after a quick round of tests.

Apologies for the hassle!

							Thanx, Paul