linux-kernel - Re: [PATCH 6/9 UPDATED] percpu: enforce global definition

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Date:	Thu, 18 Jun 2009 09:26:37 -0400
From:	Steven Rostedt <srostedt@...hat.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org,
	linux-arch@...r.kernel.org, mingo@...e.hu, kyle@...artin.ca,
	cl@...ux-foundation.org, Jesper.Nilsson@...s.com,
	benh@...nel.crashing.org, paulmck@...ux.vnet.ibm.com,
	David Howells <dhowells@...hat.com>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>, arm@...hat.com
Subject: Re: [PATCH 6/9 UPDATED] percpu: enforce global definition


On Thu, 2009-06-18 at 16:38 +0900, Tejun Heo wrote:
> Some archs (alpha and s390) need to add 'weak' attribute to percpu
> variable definitions so that the compiler generates external
> references for them.  To allow this, enforce global definition of all
> percpu variables.
> 
> This patch makes DEFINE_PER_CPU_SECTION() do DECLARE_PERCPU_SECTION()
> implicitly and drop static from all percpu definitions.
> 
> [ Impact: all percpu variables are forced to be global ]
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Reviewed-by: Christoph Lameter <cl@...ux-foundation.org>
> Acked-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

Uh, wont this cause name space collisions?

-- Steve


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