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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <YZ9ctgCBYJEEjuwt@hirez.programming.kicks-ass.net>
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.