Subject: Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures

From: "Paul E. McKenney" <[email-masked]>
Date: Wed, 15 Aug 2007 16:53:35 -0700

On Thu, Aug 16, 2007 at 07:41:46AM +0800, Herbert Xu wrote:
> On Wed, Aug 15, 2007 at 11:45:20AM -0700, Paul E. McKenney wrote:
> > On Wed, Aug 15, 2007 at 07:19:57PM +0100, David Howells wrote:
> > > Herbert Xu <[email-masked]> wrote:
> > > 
> > > > Let's turn this around.  Can you give a single example where
> > > > the volatile semantics is needed in a legitimate way?
> > > 
> > > Accessing H/W registers?  But apart from that...
> > 
> > Communicating between process context and interrupt/NMI handlers using
> > per-CPU variables.
> 
> Remeber we're talking about atomic_read/atomic_set.  Please
> cite the actual file/function name you have in mind.

Yep, we are indeed talking about atomic_read()/atomic_set().

We have been through this issue already in this thread.

							Thanx, Paul