linux-kernel - Re: [PATCH 12/20] ARM64 / ACPI: Use Parked Address in GIC structure for spin table SMP initialisation

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Date:	Fri, 17 Jan 2014 15:35:43 +0100
From:	Tomasz Nowicki <tomasz.nowicki@...aro.org>
To:	Arnd Bergmann <arnd@...db.de>, Hanjun Guo <hanjun.guo@...aro.org>
CC:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	linux-acpi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Grant Likely <grant.likely@...aro.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Olof Johansson <olof@...om.net>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Rob Herring <robh@...nel.org>,
	Mark Rutland <mark.rutland@....com>, patches@...aro.org,
	linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	linaro-acpi@...ts.linaro.org, Charles.Garcia-Tobin@....com
Subject: Re: [PATCH 12/20] ARM64 / ACPI: Use Parked Address in GIC structure
 for spin table SMP initialisation

On 01/17/14 15:15, Arnd Bergmann wrote:
> On Friday 17 January 2014, Hanjun Guo wrote:
>> +/* Parked Address in ACPI GIC structure */
>> +static u64 parked_address[NR_CPUS];
>
> Please use the per_cpu infrastructure rather than NR_CPUS long arrays.
Actually, per_cpu areas are initialized a bit later. If we really want 
to use here per_cpu, then we need to implement early_per_cpu 
Frankenstein like x86 does.

Tomasz
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