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Date:   Mon, 22 May 2023 11:45:03 +1000
From:   Stephen Rothwell <sfr@canb.auug.org.au>
To:     "Paul E. McKenney" <paulmck@kernel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>
Subject: Re: linux-next: build failure after merge of the rcu tree
Message-ID: <20230522114503.7404d59c@canb.auug.org.au>
In-Reply-To: <cc4ab028-cad3-413b-8360-ea34f6914ec7@paulmck-laptop>
References: <20230519105950.2d021e86@canb.auug.org.au>
        <cc4ab028-cad3-413b-8360-ea34f6914ec7@paulmck-laptop>
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Hi Paul,

On Thu, 18 May 2023 19:12:52 -0700 "Paul E. McKenney" <paulmck@kernel.org> =
wrote:
>
> On Fri, May 19, 2023 at 10:59:50AM +1000, Stephen Rothwell wrote:
> > Hi all,
> >=20
> > After merging the rcu tree, today's linux-next build (x86_64 allmodconf=
ig)
> > failed like this:
> >=20
> > kernel/rcu/rcuscale.c:340:27: error: 'get_rcu_tasks_trace_gp_kthread' u=
ndeclared here (not in a function); did you mean 'show_rcu_tasks_trace_gp_k=
thread'?
> >   340 |         .rso_gp_kthread =3D get_rcu_tasks_trace_gp_kthread,
> >       |                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >       |                           show_rcu_tasks_trace_gp_kthread
> >=20
> > Caused by commit
> >=20
> >   9bb839a83e1b ("rcuscale: Measure grace-period kthread CPU time")
> >=20
> > CONFIG_RCU_SCALE_TEST=3Dm
> >=20
> > I have used the rcu tree from next-20230518 for today. =20
>=20
> Huh.  Modules and #ifdefs trip me up again.  Will fix, and thank you
> for catching it!

This is now:

ERROR: modpost: "get_rcu_tasks_trace_gp_kthread" [kernel/rcu/rcuscale.ko] u=
ndefined!

I have used the rcu tree from next-20230518 again for today.
--=20
Cheers,
Stephen Rothwell

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