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

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Date:   Thu, 29 Jun 2017 11:42:59 +0200
From:   Johannes Thumshirn <jthumshirn@...e.de>
To:     Mauro Carvalho Chehab <mchehab@...pensource.com>
Cc:     Hans Verkuil <hans.verkuil@...co.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Linux Kernel Mailinglist <linux-kernel@...r.kernel.org>,
        linux-media@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-fbdev@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH RESEND 0/7] Introduce MEDIA_VERSION to end KENREL_VERSION
 abuse in media

On Sat, Jun 24, 2017 at 05:15:07PM -0300, Mauro Carvalho Chehab wrote:
> Sorry, but I can't see any advantage on it. On the downside, it
> includes the media controller header file (media.h) where it
> is not needed.

My reasoning was the differences in semantics. KERNEL_VERSION() is for
encoding the kernel's version triplet not a API or Hardware or whatever
version. Other subsystems do this as well, for instance in NVMe we have the
NVME_VS() macro which is used to encode the NVMe Spec compliance from a human
readable form to the hardware's u32. Also KERNEL_VERISON() shouldn't have
in-tree users IMHO. Yes there is _one_ other user of it in-tree which is EXT4
and I already talked to Jan Kara about it and we decided to leave it in until
4.20.

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