linux-kernel - Re: [patch 4/7] cpu ops: Core piece for generic atomic per cpu operations

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Message-ID: <Pine.LNX.4.64.0811060905280.3595@quilx.com>
Date:	Thu, 6 Nov 2008 09:05:46 -0600 (CST)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Dave Chinner <david@...morbit.com>
cc:	akpm@...ux-foundation.org, Pekka Enberg <penberg@...helsinki.fi>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, travis@....com,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Vegard Nossum <vegard.nossum@...il.com>
Subject: Re: [patch 4/7] cpu ops: Core piece for generic atomic per cpu
 operations

On Thu, 6 Nov 2008, Dave Chinner wrote:

> On Wed, Nov 05, 2008 at 05:16:38PM -0600, Christoph Lameter wrote:
> > +
> > +#define __CPU_CMPXCHG(var, old, new)		\
> > +({						\
> > +	typeof(obj) x;				\
> > +	typeof(obj) *p = THIS_CPU(&(obj));	\
> > +	x = *p;					\
> > +	if (x == (old))				\
> > +		*p = (new);			\
> > +	(x);					\
> > +})
>
> I don't think that will compile - s/obj/var/ perhaps?

Correct.

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