linux-kernel - Re: [PATCH 02/12] percpu: introduce arch_raw_cpu

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Message-ID: <alpine.DEB.2.10.1406131209540.1717@gentwo.org>
Date:	Fri, 13 Jun 2014 12:10:36 -0500 (CDT)
From:	Christoph Lameter <cl@...two.org>
To:	Tejun Heo <tj@...nel.org>
cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH 02/12] percpu: introduce arch_raw_cpu_ptr()

On Thu, 12 Jun 2014, Tejun Heo wrote:

> Currently, archs can override raw_cpu_ptr() directly; however, we
> wanna build a layer of indirection in the generic part of percpu so
> that we can implement generic features there without affecting archs.

Not sure why one would do this. We already have this_cpu_ptr() (arch
independant) and the lower level raw_cpu_ptr() which can be modified by
the arch code.

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