netdev - Re: Linux 2.6.35/TIPC 2.0 ABI breaking changes

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Message-ID: <20101019005819.24c8d373@lxorguk.ukuu.org.uk>
Date:	Tue, 19 Oct 2010 00:58:19 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	David Miller <davem@...emloft.net>
Cc:	paul.gortmaker@...driver.com, luca@...cax.com.ar,
	jon.maloy@...csson.com, tipc-discussion@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: Linux 2.6.35/TIPC 2.0 ABI breaking changes

On Mon, 18 Oct 2010 15:17:08 -0700 (PDT)
David Miller <davem@...emloft.net> wrote:

> From: Paul Gortmaker <paul.gortmaker@...driver.com>
> Date: Mon, 18 Oct 2010 16:42:33 -0400
> 
> > If you have access to the user space code in question, you can just
> > switch behaviour semantics based on the results of a uname call, knowing
> > that this change was included in versions since approx last Feb.  There
> > is also /proc/version which can be parsed manually if you prefer.
> 
> Requiring userspace to check kernel versioning information in order
> to user an exported userspace API correctly is _ALWAYS_ _WRONG_.
> 
> You cannot and must not make backwards incompatible changes to
> userspace interfaces.
> 
> Really, you can't.

In which case given that most distros are shipping older stuff and care
about ABI stability presumably the bug should get fixed for 2.6.36 ?
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