linux-kernel - Re: [guv v2 22/31] arm: Replace __get_cpu

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Message-ID: <20130827094143.GC19897@arm.com>
Date:	Tue, 27 Aug 2013 10:41:43 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Tejun Heo <tj@...nel.org>,
	"akpm@...uxfoundation.org" <akpm@...uxfoundation.org>,
	Russell King <linux@....linux.org.uk>,
	Will Deacon <Will.Deacon@....com>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
	Steven Rostedt <srostedt@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [guv v2 22/31] arm: Replace __get_cpu_var uses

On Mon, Aug 26, 2013 at 09:44:52PM +0100, Christoph Lameter wrote:
> This patch converts __get_cpu_var into either and explicit address calculation using this_cpu_ptr()
> or into a use of this_cpu operations that use the offset. Thereby address calcualtions are avoided
> and less registers are used when code is generated.
...
> Index: linux/arch/arm64/kernel/debug-monitors.c
> ===================================================================
> --- linux.orig/arch/arm64/kernel/debug-monitors.c	2013-08-26 13:48:40.956794980 -0500
> +++ linux/arch/arm64/kernel/debug-monitors.c	2013-08-26 13:48:40.952795024 -0500
...
> Index: linux/arch/arm64/kernel/hw_breakpoint.c
> ===================================================================
> --- linux.orig/arch/arm64/kernel/hw_breakpoint.c	2013-08-26 13:48:40.956794980 -0500
> +++ linux/arch/arm64/kernel/hw_breakpoint.c	2013-08-26 13:48:40.952795024 -0500
...
> Index: linux/arch/arm64/kernel/perf_event.c
> ===================================================================
> --- linux.orig/arch/arm64/kernel/perf_event.c	2013-08-26 13:48:40.956794980 -0500
> +++ linux/arch/arm64/kernel/perf_event.c	2013-08-26 13:48:40.952795024 -0500

For the arm64 bits:

Acked-by: Catalin Marinas <catalin.marinas@....com>
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