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Date: Tue, 9 Sep 2014 17:37:45 +0100
From: Catalin Marinas <catalin.marinas@....com>
To: Hanjun Guo <hanjun.guo@...aro.org>
Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>,
Mark Rutland <Mark.Rutland@....com>,
Olof Johansson <olof@...om.net>,
"grant.likely@...aro.org" <grant.likely@...aro.org>,
"graeme.gregory@...aro.org" <graeme.gregory@...aro.org>,
Arnd Bergmann <arnd@...db.de>,
Sudeep Holla <Sudeep.Holla@....com>,
Will Deacon <Will.Deacon@....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>,
Al Stone <al.stone@...aro.org>
Subject: Re: [PATCH v3 04/17] ARM64 / ACPI: Introduce early_param for "acpi"
On Mon, Sep 01, 2014 at 03:57:42PM +0100, Hanjun Guo wrote:
> --- a/arch/arm64/kernel/acpi.c
> +++ b/arch/arm64/kernel/acpi.c
> @@ -74,3 +74,18 @@ void __init acpi_boot_table_init(void)
> * TBD when ARM/ARM64 starts to support suspend...
> */
> int (*acpi_suspend_lowlevel)(void) = NULL;
> +
> +static int __init parse_acpi(char *arg)
> +{
> + if (!arg)
> + return -EINVAL;
> +
> + /* "acpi=off" disables both ACPI table parsing and interpreter */
> + if (strcmp(arg, "off") == 0)
> + disable_acpi();
> + else
> + return -EINVAL; /* Core will print when we return error */
> +
> + return 0;
> +}
> +early_param("acpi", parse_acpi);
I forgot about early param, so there is a way to set acpi_disabled to 1
before populating the tables.
--
Catalin
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