linux-kernel - Re: [Use cpuops V1 04/11] x86: Use this_cpu_ops for current_cpu

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Message-ID: <alpine.DEB.2.00.1012070846050.25976@router.home>
Date:	Tue, 7 Dec 2010 08:46:52 -0600 (CST)
From:	Christoph Lameter <cl@...ux.com>
To:	Tejun Heo <tj@...nel.org>
cc:	akpm@...ux-foundation.org, Yinghai Lu <yinghai@...nel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Pekka Enberg <penberg@...helsinki.fi>,
	linux-kernel@...r.kernel.org,
	Eric Dumazet <eric.dumazet@...il.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Subject: Re: [Use cpuops V1 04/11] x86: Use this_cpu_ops for current_cpu_data
 accesses

On Tue, 7 Dec 2010, Tejun Heo wrote:

> > This belongs to the previous patch, right?  I'll move it over and
> > apply 03 and 04.  I think routing these through percpu is okay but if
> > anyone wants these to go through x86, scream.
>
> Ooh, was too fast.  I think mixing the use of percpu accesses to
> cpu_info and the wrapper macro current_cpu_data is quite confusing.
> There aren't too many current_cpu_data users in x86 anyway.  Can you
> please make the conversion complete?  I'm moving the above misplaced
> chunk into 03 and not applying 04 for now.

We cannot make that conversion complete since we cannot obtain the address
if we use a this_cpu operation. Then its better to drop this patch.

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