linux-kernel - Re: [PATCH v4 01/18] ARM64: Move the init of cpu_logical_map(0) before unflatten_device

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Message-ID: <20140917164850.GB7983@leverpostej>
Date:	Wed, 17 Sep 2014 17:48:50 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	Olof Johansson <olof@...om.net>
Cc:	"hanjun.guo@...aro.org" <hanjun.guo@...aro.org>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	Will Deacon <Will.Deacon@....com>,
	"graeme.gregory@...aro.org" <graeme.gregory@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	Sudeep Holla <Sudeep.Holla@....com>,
	"jcm@...hat.com" <jcm@...hat.com>,
	Jason Cooper <jason@...edaemon.net>,
	Marc Zyngier <Marc.Zyngier@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
	Robert Richter <rric@...nel.org>,
	Lv Zheng <lv.zheng@...el.com>,
	Robert Moore <robert.moore@...el.com>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Liviu Dudau <Liviu.Dudau@....com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Charles Garcia-Tobin <Charles.Garcia-Tobin@....com>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linaro-acpi@...ts.linaro.org" <linaro-acpi@...ts.linaro.org>
Subject: Re: [PATCH v4 01/18] ARM64: Move the init of cpu_logical_map(0)
 before unflatten_device_tree()

On Mon, Sep 15, 2014 at 07:16:32AM +0100, Olof Johansson wrote:
> On Fri, Sep 12, 2014 at 09:59:59PM +0800, Hanjun Guo wrote:
> > It always make sense to initialize CPU0's logical map entry from the
> > hardware values, so move the initialization of cpu_logical_map(0)
> > before unflatten_device_tree() which is needed by ACPI code later.
> > 
> > Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
> 
> Acked-by: Olof Johansson <olof@...om.net>
> 
> With or without needs for ACPI, I don't think there's any reason for
> this code to not go in now.

I can see this being of use to psci_init() where I'd like to check
MIGRATE_INFO_TYPE and MIGRATE_INFO_UP_CPU early on for systems with PSCI
0.2+. So moving it at least that early sounds good to me.

Acked-by: Mark Rutland <mark.rutland@....com>

Mark.
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