linux-kernel - Re: [PATCH RESEND v2] devfreq: move governor.h to a public header location

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 for Android: free password hash cracker in your pocket

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

Message-ID: <cdzlgnun7kpn24hziut23njsnlnzl465hdquq4zfmur7ylt5id@ioaqt5ilixwt>
Date: Fri, 7 Nov 2025 05:16:23 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: MyungJoo Ham <myungjoo.ham@...sung.com>
Cc: Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
        Robie Basak <robibasa@....qualcomm.com>
Subject: Re: [PATCH RESEND v2] devfreq: move governor.h to a public header
 location

On Fri, Nov 07, 2025 at 09:58:09AM +0900, MyungJoo Ham wrote:
> >Sender: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com> 
> >Date: 2025-10-31 03:26 (GMT+9)
> >Title: [PATCH RESEND v2] devfreq: move governor.h to a public header location
> >
> >Some device drivers (and out-of-tree modules) might want to define
> >device-specific device governors. Rather than restricting all of them to
> >be a part of drivers/devfreq/ (which is not possible for out-of-tree
> >drivers anyway) move governor.h to include/linux/devfreq-governor.h and
> >update all drivers to use it.
> >
> >The devfreq_cpu_data is only used internally, by the passive governor,
> >so it is moved to the driver source rather than being a part of the
> >public interface.
> 
> Hi!
> 
> Could you please direct me to the governors or drivers needing this?
> (Qualcomm drivers?)

This has been prompted by the Qualcomm KGSL driver:

- https://github.com/qualcomm-linux/kgsl
- https://github.com/qualcomm-linux/kgsl/issues/11

But I think this issue is not limited to the KGSL driver. Other
out-of-tree modules might also implement device-specific governors.

-- 
With best wishes
Dmitry