linux-kernel - Re: [PATCH 08/14] sched/core: Export runqueues per-cpu array

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Date:   Fri, 8 May 2020 11:04:25 +0100
From:   Quentin Perret <qperret@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, x86@...nel.org,
        hpa@...or.com, sudeep.holla@....com, gregkh@...uxfoundation.org,
        rafael@...nel.org, viresh.kumar@...aro.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        mcgrof@...nel.org, keescook@...omium.org, yzaikin@...gle.com,
        fweisbec@...il.com, tkjos@...gle.com, kernel-team@...roid.com
Subject: Re: [PATCH 08/14] sched/core: Export runqueues per-cpu array

On Friday 08 May 2020 at 10:07:59 (+0200), Peter Zijlstra wrote:
> On Thu, May 07, 2020 at 07:10:06PM +0100, Quentin Perret wrote:
> > It will be needed by schedutil once modularized, export it.
> > 
> > Signed-off-by: Quentin Perret <qperret@...gle.com>
> > ---
> > This is only needed for cpu_rq() -> cpu_bw_dl() in schedutil, so there is
> > probably an alternative if exporting this isn't desirable.
> > ---
> >  kernel/sched/core.c | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> > index dbaf3f63df22..537eb45b4274 100644
> > --- a/kernel/sched/core.c
> > +++ b/kernel/sched/core.c
> > @@ -36,6 +36,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_se_tp);
> >  EXPORT_TRACEPOINT_SYMBOL_GPL(sched_overutilized_tp);
> >  
> >  DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues);
> > +EXPORT_SYMBOL_GPL(runqueues);
> 
> NAK, never going to happen.

Well, I should have seen that one coming :-)

As mentioned in the commit message, we might be able to work around.
I'll cook something for v2.

Thanks,
Quentin