linux-kernel - What is the difference between percpu_xxx and this_cpu

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Message-ID: <4E6EDBFB.4010705@intel.com>
Date:	Tue, 13 Sep 2011 12:28:43 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Tejun Heo <tj@...nel.org>,
	Christoph Lameter <cl@...ux-foundation.org>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: What is the difference between percpu_xxx and this_cpu_xxx?

Hi,

If my understanding was correct, from the kernel source code, it appears
that percpu_xxx and this_cpu_xxx have the same semantics and
implementation in effect, haven’t them?

If so, why do we need two API for the same thing?

Best Regards,
Huang Ying
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