linux-kernel - Re: [PATCH v3 05/13] thermal: qoriq: Embed per-sensor data into struct qoriq_tmu

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: <4a61e24a-fbb5-30f6-691a-0376fbca7b46@linaro.org>
Date:   Thu, 11 Apr 2019 18:54:47 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Andrey Smirnov <andrew.smirnov@...il.com>
Cc:     linux-pm@...r.kernel.org, Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Zhang Rui <rui.zhang@...el.com>,
        Eduardo Valentin <edubezval@...il.com>,
        Angus Ainslie <angus@...ea.ca>,
        dl-linux-imx <linux-imx@....com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 05/13] thermal: qoriq: Embed per-sensor data into
 struct qoriq_tmu_data

On 05/04/2019 20:00, Andrey Smirnov wrote:
> On Thu, Apr 4, 2019 at 12:57 AM Daniel Lezcano
> <daniel.lezcano@...aro.org> wrote:
>>
>> On 01/04/2019 06:14, Andrey Smirnov wrote:
>>> Embed per-sensor data into struct qoriq_tmu_data so we can drop the
>>> code allocating it. This also allows us to get rid of per-sensor back
>>> reference to struct qoriq_tmu_data since now its address can be
>>> caluclated using container_of().
>>
>> This seems to be a repeating pattern, drivers are forced to put a back
>> pointer in the thermal sensor structure to regain access to the
>> container structure in the get_temp callback.
>>
>> It would make sense to pass the sensor id to the get_temp callback as we
>> register with the sensor id.
>>
> 
> I'll rebase this series on the two patches you submitted.

Well I should have added the RFC tag because I was not able to test with
a platform.

[ ... ]

>> Why not replace the little_endian boolean by a couple of callback
>> read/write and assign them to ioread32|ioread32be at init time.
>>
>> That will kill the tmu_read and tmu_write functions and from there you
>> can figure out how to remove the qdata backpointer. In addition, it will
>> save a few instructions to test the boolean.
>>
> 
> I am sure you've seen it by now, but little_endian is going away in
> this series in regmap conversion patch.

Right :)


-- 
 <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog