linux-kernel - Re: [PATCH] percpu_counter: change inaccurate comment

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Message-ID: <alpine.DEB.2.00.1010071509180.28032@router.home>
Date:	Thu, 7 Oct 2010 15:13:48 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] percpu_counter: change inaccurate comment

On Thu, 7 Oct 2010, Eric Dumazet wrote:

> If enclosed by preempt_disable()/preempt_enable(), maybe we could use
> __this_cpu_ptr() ?

The only difference between __this_cpu_ptr and this_cpu_ptr is that
this_cpu_ptr checks that preempt was disabled. __this_cpu_ptr allows use
even without preempt. Preempt must be disabled here so the use of
this_cpu_ptr is appropriate.


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