linux-kernel - Re: [cpuops cmpxchg double V1 1/4] Generic support for this_cpu_cmpxchg

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Message-ID: <alpine.DEB.2.00.1012211634560.3769@router.home>
Date:	Tue, 21 Dec 2010 16:36:00 -0600 (CST)
From:	Christoph Lameter <cl@...ux.com>
To:	Tejun Heo <tj@...nel.org>
cc:	akpm@...ux-foundation.org, Pekka Enberg <penberg@...helsinki.fi>,
	linux-kernel@...r.kernel.org,
	Eric Dumazet <eric.dumazet@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Subject: Re: [cpuops cmpxchg double V1 1/4] Generic support for
 this_cpu_cmpxchg_double

On Sat, 18 Dec 2010, Tejun Heo wrote:

> pointers from the beginning.  Anyways, that's too late, so is it
> completely impossible to make cmpxchg_double's take a scalar value?
> It can take the pointer all the same, no?

It could take a scalar value like the others but we are then not operating
on the scalar alone but also on the following field.

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