linux-kernel - Re: [PATCH 1/2] iio: core: Support removing extended name in attribute filename

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Message-Id: <TPLHUQ.MUVY4TY05YFY2@crapouillou.net>
Date:   Thu, 10 Jun 2021 14:05:53 +0100
From:   Paul Cercueil <paul@...pouillou.net>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <michael.hennerich@...log.com>,
        linux-iio <linux-iio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] iio: core: Support removing extended name in
 attribute filename

Hi Andy,

Le jeu., juin 10 2021 at 15:58:51 +0300, Andy Shevchenko 
<andy.shevchenko@...il.com> a écrit :
> On Thu, Jun 10, 2021 at 3:47 PM Paul Cercueil <paul@...pouillou.net> 
> wrote:
>> 
>>  By default, when a channel has an extended name, it will appear in 
>> the
>>  filename of channel attributes. E.g. if the extended name is "aux", 
>> the
>>  filename of a "sample_rate" attribute will be something like:
>>  in_voltage0_aux_sample_rate
>> 
>>  Add a mechanism to disable this feature. This will be used to add a
>>  "extended_name" channel attribute.
> 
> I'm afraid, NAK. Otherwise, please put an explanation that clearly
> shows that it will be no ABI breakage.
> I.o.w. users for the existing drivers and devices will always get
> those attributes at the same platform configuration(s).

Well, the commit message says that I'm adding a mechanism to disable 
the feature. If it was actually doing anything else (like actually 
disabling it for any attribute) then I'd mention it in the commit 
message.

I don't see how that possibly can be a ABI breakage.

-Paul