linux-kernel - Re: [PATCH 2/4] sched/core: Export symbols used by cpuidle governors

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Date:   Thu, 25 Nov 2021 10:35:23 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Maulik Shah <quic_mkshah@...cinc.com>
Cc:     bjorn.andersson@...aro.org, rafael@...nel.org,
        daniel.lezcano@...aro.org, linux-arm-msm@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        ulf.hansson@...aro.org, quic_lsrao@...cinc.com,
        rnayak@...eaurora.org, Ingo Molnar <mingo@...hat.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>
Subject: Re: [PATCH 2/4] sched/core: Export symbols used by cpuidle governors

On Thu, Nov 25, 2021 at 02:24:39PM +0530, Maulik Shah wrote:
> Export symbols that are used by cpuidle menu governor in preparation
> to allow cpuidle governors to be compiled as modules.
> 
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Juri Lelli <juri.lelli@...hat.com>
> Cc: Vincent Guittot <vincent.guittot@...aro.org>
> Signed-off-by: Maulik Shah <quic_mkshah@...cinc.com>
> ---
>  kernel/sched/core.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index 8cffe31..1d031e0 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -5047,6 +5047,7 @@ unsigned int nr_iowait_cpu(int cpu)
>  {
>  	return atomic_read(&cpu_rq(cpu)->nr_iowait);
>  }
> +EXPORT_SYMBOL(nr_iowait_cpu);

NACK, that function is batshit insane, exporting it serves nobody.