linux-kernel - Re: [PATCH v3 1/1] hwmon: (k8temp) update to use new hwmon registration API

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Message-ID: <91304a1b-26d5-a6a8-c89e-18cde6614d73@roeck-us.net>
Date:   Sun, 21 Jul 2019 17:03:36 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     avoidr@...eup.net
Cc:     Rudolf Marek <r.marek@...embler.cz>,
        Jean Delvare <jdelvare@...e.com>, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Robert Karszniewicz <avoidr@...email.cc>,
        linux-hwmon-owner@...r.kernel.org
Subject: Re: [PATCH v3 1/1] hwmon: (k8temp) update to use new hwmon
 registration API

On 7/21/19 1:37 PM, avoidr@...eup.net wrote:
> On 2019-07-21 17:14, Guenter Roeck wrote:
>> On Sun, Jul 21, 2019 at 02:00:51PM +0200, Robert Karszniewicz wrote:
>>> Removes:
>>> - hwmon_dev from k8temp_data struct, as that is now passed
>>>    to callbacks, anyway.
>>> - other k8temp_data struct fields, too.
>>> - k8temp_update_device()
>>>
>>> Also reduces binary size:
>>>     text    data     bss     dec     hex filename
>>>     4139    1448       0    5587    15d3 drivers/hwmon/k8temp.ko.bak
>>>     3103    1220       0    4323    10e3 drivers/hwmon/k8temp.ko
>>>
>>> Signed-off-by: Robert Karszniewicz <avoidr@...email.cc>
>>> Signed-off-by: Robert Karszniewicz <avoidr@...eup.net>
>>
>> Applied.
> 
> Thank you! It's been a joy!
> 
>>> ---
>>> Changes from v2:
>>> - if (data->swap_core_select)
>>> -     core ^= 1;
>>> + core ^= data->swap_core_select;
>>>
>>> However, that produces slightly more .text than v2, and is a tad too
>>> "tricky", I personally find.
>>>
>> Interesting - for me it produces ~30 bytes less code (with gcc 7.4.0).
> 
> Strange. I just verified to make sure and I do get ~30 bytes /more/ code
> (with gcc 9.1.0).
> 

Mine is gcc 7.4.0. Oh well...

Guenter