linux-kernel - Re: [PATCH v4 07/13] ARM64 / ACPI: Introduce lowlevel suspend function

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Message-ID: <20140630162817.GS28951@arm.com>
Date:	Mon, 30 Jun 2014 17:28:17 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Hanjun Guo <hanjun.guo@...aro.org>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"rric@...nel.org" <rric@...nel.org>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	Sudeep Holla <Sudeep.Holla@....com>,
	Mark Rutland <Mark.Rutland@....com>,
	Charles Garcia-Tobin <Charles.Garcia-Tobin@....com>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	"linaro-acpi@...ts.linaro.org" <linaro-acpi@...ts.linaro.org>,
	"graeme.gregory@...aro.org" <graeme.gregory@...aro.org>
Subject: Re: [PATCH v4 07/13] ARM64 / ACPI: Introduce lowlevel suspend
 function

On Fri, Jun 27, 2014 at 04:49:30AM +0100, Hanjun Guo wrote:
> From: Graeme Gregory <graeme.gregory@...aro.org>
> 
> acpi_wakeup_address is used on x86 as the address bios jumps into
> when machine wakes up from suspend. As arm64 does not have such a
> bios this mechanism will be provided by other means. But the define
> is still required inside the acpi core.

Why not fix the place where it is used rather than defining a dummy
pointer?

> Introduce a null stub for acpi_suspend_lowlevel as this is also
> required by core. This will be filled in when standards are
> defined for arm64 ACPI global power states.

I assume acpi_suspend_lowlevel would be just a dummy definition but it
will have some use when the standard allows.

-- 
Catalin
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