linux-kernel - Re: [PATCH] sched/idle: Export cpu_idle_poll

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Date:   Thu, 25 Nov 2021 10:51:50 +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] sched/idle: Export cpu_idle_poll_ctrl() symbol

On Thu, Nov 25, 2021 at 02:44:36PM +0530, Maulik Shah wrote:
> Export cpu_idle_poll_ctrl() so that module drivers can use same.

This does not seem like a really safe interface to expose to the
world.

Surely the better solution is to rework things to not rely on this. I'm
fairly sure it's not hard to write a cpuidle driver that does much the
same.