linux-kernel - Re: [PATCH RESEND 0/7] Introduce MEDIA_VERSION to end KENREL

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Date:   Fri, 30 Jun 2017 09:27:29 +0200
From:   Johannes Thumshirn <jthumshirn@...e.de>
To:     Stephen Hemminger <stephen@...workplumber.org>
Cc:     Mauro Carvalho Chehab <mchehab@...pensource.com>,
        devel@...verdev.osuosl.org, linux-fbdev@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org,
        Linux Kernel Mailinglist <linux-kernel@...r.kernel.org>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org
Subject: Re: [PATCH RESEND 0/7] Introduce MEDIA_VERSION to end KENREL_VERSION
 abuse in media

On Thu, Jun 29, 2017 at 10:01:05AM -0700, Stephen Hemminger wrote:
> If you read Linus's comments on version.
> Driver version is meaningless and there is a desire to rip it out of all
> drivers. The reason is that drivers must always behave the same, i.e you
> can't use version to change API/ABI behavior. 

Indeed this causes more harm than good. We had support calls regarding the
mlx4 driver because of not incremented MODLE_VERSION()s. If we follow your
and Linus' path we shouldn't just get rid of the KERNEL_VERSION() usage
in media and replace it with a new version, but kill all the versioning
stuff out of media (and others) except for maybe the HW version.

> Any upstream driver should never use KERNEL_VERSION().

Exactly my reasoning.

-- 
Johannes Thumshirn                                          Storage
jthumshirn@...e.de                                +49 911 74053 689
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