linux-kernel - Re: [PATCH v7 04/17] ARM64 / ACPI: Introduce early_param for "acpi" and pass acpi=force to enable ACPI

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Message-ID: <20150120123113.GP3827@bivouac.eciton.net>
Date:	Tue, 20 Jan 2015 12:31:13 +0000
From:	Leif Lindholm <leif.lindholm@...aro.org>
To:	Mark Rutland <mark.rutland@....com>
Cc:	Hanjun Guo <hanjun.guo@...aro.org>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"jcm@...hat.com" <jcm@...hat.com>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	"linaro-acpi@...ts.linaro.org" <linaro-acpi@...ts.linaro.org>,
	Will Deacon <Will.Deacon@....com>,
	"wangyijing@...wei.com" <wangyijing@...wei.com>,
	Rob Herring <robh@...nel.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Al Stone <al.stone@...aro.org>,
	Timur Tabi <timur@...eaurora.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	Charles Garcia-Tobin <Charles.Garcia-Tobin@....com>,
	"phoenix.liyi@...wei.com" <phoenix.liyi@...wei.com>,
	Robert Richter <rric@...nel.org>,
	Jason Cooper <jason@...edaemon.net>,
	Arnd Bergmann <arnd@...db.de>,
	Marc Zyngier <Marc.Zyngier@....com>,
	Mark Brown <broonie@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"graeme.gregory@...aro.org" <graeme.gregory@...aro.org>,
	Randy Dunlap <rdunlap@...radead.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"suravee.suthikulpanit@....com" <suravee.suthikulpanit@....com>,
	Sudeep Holla <Sudeep.Holla@....com>,
	Olof Johansson <olof@...om.net>
Subject: Re: [PATCH v7 04/17] ARM64 / ACPI: Introduce early_param for "acpi"
 and pass acpi=force to enable ACPI

On Tue, Jan 20, 2015 at 11:10:32AM +0000, Mark Rutland wrote:
> > diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
> > index 54e39e3..8268c7b 100644
> > --- a/arch/arm64/kernel/setup.c
> > +++ b/arch/arm64/kernel/setup.c
> > @@ -371,6 +371,31 @@ static void __init request_standard_resources(void)
> >   	}
> >   }
> > 
> > +int __init dt_scan_chosen(unsigned long node, const char *uname,
> > +			int depth, void *data)
> > +{
> > +	const char *p;
> > +	
> > +	if (depth != 1 || !data ||
> > +	    (strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
> > +		return 0;
> 
> Do we ever generate chosen@0, and do we even accept that?

This probably originates from some stupid cargo-culting on my side,
based on some of the PPC-specific workarounds for old machines
remaining in drivers/of/*. It should go.

/
    Leif
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