linux-kernel - Re: [PATCH 26/35] [PATCH 26/36] powerpc: Replace __get_cpu

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Date:	Tue, 26 Aug 2014 14:14:44 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Christoph Lameter <cl@...ux.com>
Cc:	akpm@...uxfoundation.org, rostedt@...dmis.org,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: [PATCH 26/35] [PATCH 26/36] powerpc: Replace __get_cpu_var uses

On Sun, Aug 17, 2014 at 12:30:49PM -0500, Christoph Lameter wrote:
> __get_cpu_var() is used for multiple purposes in the kernel source. One of
> them is address calculation via the form &__get_cpu_var(x).  This calculates
> the address for the instance of the percpu variable of the current processor
> based on an offset.
> 
> Other use cases are for storing and retrieving data from the current
> processors percpu area.  __get_cpu_var() can be used as an lvalue when
> writing data or on the right side of an assignment.
...
> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> CC: Paul Mackerras <paulus@...ba.org>
> Signed-off-by: Christoph Lameter <cl@...ux.com>

(Please disregard the ones I posted for v1 of the patch series)

Applied to percpu/for-3.18-consistent-ops with the fix up patch rolled
in.  Please let me know if this patch should be routed differently.
Note that this patch was to be applied to percpu/for-3.17 but delayed
due to build issues caused by cpumask_var_t.

Thanks.

-- 
tejun
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