netdev - Re: [PERCPU] Remove & in front of this_cpu

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Date:	Thu, 4 Apr 2013 07:00:40 -0700
From:	Tejun Heo <htejun@...il.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	RongQing Li <roy.qing.li@...il.com>,
	Shan Wei <davidshan@...cent.com>, netdev@...r.kernel.org
Subject: Re: [PERCPU] Remove & in front of this_cpu_ptr

Hello, Christoph.

On Thu, Apr 04, 2013 at 01:52:00PM +0000, Christoph Lameter wrote:
> The method that I proposed is also conforming with the use of other
> this_cpu_ops. F.e. In order to do a read one would need to do
> 
> x = this_cpu_read(percpu_pointer->field)
> 
> 
> 
> 
> x = this_cpu_read(percpu_pointer)->field
> 
> does not work (and does not pass sparse).

Right, this is true, and we *do* wanna support this_cpu ops other than
this_cpu_ptr on per-cpu struct fields.  The usage is still somewhat
unusual tho.  Can we please add documentation in the comments too?

Thanks.

-- 
tejun
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