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Subject: Re: 2.6.18 Headers - Long
From: Arjan van de Ven <arjan@infradead.org>
To: Albert Cahalan <acahalan@gmail.com>
Cc: Kyle Moffett <mrmacman_g4@mac.com>, dwmw2@infradead.org,
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Date: Mon, 17 Jul 2006 03:26:18 +0200
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On Sun, 2006-07-16 at 15:22 -0400, Albert Cahalan wrote:
> On 7/16/06, Russell King <rmk+lkml@arm.linux.org.uk> wrote:
> > On Sun, Jul 16, 2006 at 02:38:45PM -0400, Albert Cahalan wrote:
> > > On 7/16/06, Kyle Moffett <mrmacman_g4@mac.com> wrote:
> > > >On Jul 15, 2006, at 17:09:28, Albert Cahalan wrote:
> > >
> > > >You realize that on a couple architectures it's fundamentally
> > > >impossible to get atomic ops completely in userspace, right?
> > >
> > > Sure. Those architectures don't need to drag down the rest.
> > > Plenty of headers are only exported for some architectures.
> >
> > Wrong perspective.  The problem is that they may _appear_ to work as
> > described, but not actually work in the intended way.  That's a bug,
> > and it's a _hard_ bug to locate.
> 
> Again:
> 
> Plenty of headers are only exported for some architectures.


and guess what... atomic.h does not work on i386, at least it doesn't
provide atomic access in userspace!