linux-kernel - Re: [PATCH 1/1] MM: slqb, fix per

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Message-ID: <4AEEF9AE.1090904@kernel.org>
Date:	Tue, 03 Nov 2009 00:24:30 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Jiri Slaby <jirislaby@...il.com>
CC:	npiggin@...e.de, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	Christoph Lameter <cl@...ux-foundation.org>
Subject: Re: [PATCH 1/1] MM: slqb, fix per_cpu access

2009년 11월 02일 17:49, Jiri Slaby wrote:
> We cannot use the same local variable name as the declared per_cpu
> variable since commit "percpu: remove per_cpu__ prefix."
> 
> Otherwise we would see crashes like:
> general protection fault: 0000 [#1] SMP
> last sysfs file:
> CPU 1
> Modules linked in:
> Pid: 1, comm: swapper Tainted: G        W  2.6.32-rc5-mm1_64 #860
> RIP: 0010:[<ffffffff8142ff94>]  [<ffffffff8142ff94>] start_cpu_timer+0x2b/0x87
> ...
> 
> Use slqb_ prefix for the global variable so that we don't collide
> even with the rest of the kernel (s390 and alpha need this).
> 
> Signed-off-by: Jiri Slaby <jirislaby@...il.com>
> Cc: Nick Piggin <npiggin@...e.de>
> Cc: Tejun Heo <tj@...nel.org>
> Cc: Rusty Russell <rusty@...tcorp.com.au>
> Cc: Christoph Lameter <cl@...ux-foundation.org>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun
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