Date: Mon, 2 Jun 2008 11:10:35 -0700
From: Brandon Philips <bphilips@suse.de>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: David Woodhouse <dwmw2@infradead.org>, torvalds@linux-foundation.org,
       akpm@linux-foundation.org,
       Mauro Carvalho Chehab <mchehab@infradead.org>,
       linux-kernel@vger.kernel.org, Bastien Nocera <bnocera@redhat.com>
Subject: Re: v4l regression: V4L2_CID_[VH]CENTER disappeared without notice.
Message-ID: <20080602181035.GA440@plankton.ifup.org>
References: <200804241931.m3OJVQiR022368@hera.kernel.org> <1212421611.16924.246.camel@pmac.infradead.org> <20080602165649.01c2c680@core>
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On 16:56 Mon 02 Jun 2008, Alan Cox wrote:
> > Please can we revert the addition of _DEPRECATED to these ioctl
> > definitions. Perhaps we can add a runtime warning if they actually get
> > used? Or a compile-time warning if we can manage that?
> 
> Can you clarify the problem here ? Is this compile breakage as it appears
> (See 'do not include kernel headers in user space apps') or runtime ?

It is compile breakage and was also discussed on
fedora-devel-list@redhat.com with Mauro and myself CC'd.  The control
number will be reserved forever to avoid binary breakage.

However, as Mauro noted in that conversation: "Those controls haven't
been used by any Kernel drivers for a long time (I suspect that they
were never used)."  Since no driver had ever implemented the control I
figured user space application wouldn't be using it either.

If David wants to revert the _DEPRECATED tags that is fine; we can add a
feature removal for a year from now if it gets merged.

Thanks,

	Brandon
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