linux-kernel - Re: cmpxchg is not available to generic code

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Date:	Thu, 19 Jul 2007 01:36:15 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Dave Airlie <airlied@...ux.ie>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: cmpxchg is not available to generic code

On Thu, 19 Jul 2007 09:19:10 +0100 (IST) Dave Airlie <airlied@...ux.ie> wrote:

> >
> >> they need to grow a userpsace
> >> cmpxchg as davem mentioned to go along with this, changing the drm now
> >> isn't possible due to backwards compat..
> >
> > For reference purposes, that position is not acceptable.  We _never_ accept the
> > "oh I can't change my proposed kernel interface because I already have
> > userspace relying on it" argument.
> 
> Yes it is, I thought breaking userspace API was the worst crime in kernel 
> history, (unless you are sysfs...) the userspace DRM has been around since 
> 2.2 days at least, so there are lots of legacy userspaces to break..

oh, sorry, I thought this cmpxchg stuff was newly-added.

I guess something changed which has now made DRM available under arm
allmodconfig.


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