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Date: Mon, 15 Sep 2014 12:31:16 -0400 From: Jon Masters <jcm@...hat.com> To: Catalin Marinas <catalin.marinas@....com>, Olof Johansson <olof@...om.net> CC: "hanjun.guo@...aro.org" <hanjun.guo@...aro.org>, "Rafael J. Wysocki" <rjw@...ysocki.net>, Mark Rutland <Mark.Rutland@....com>, "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>, 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 v4 06/18] ARM64 / ACPI: Introduce early_param for "acpi" On 09/15/2014 10:51 AM, Catalin Marinas wrote: > On Mon, Sep 15, 2014 at 07:28:24AM +0100, Olof Johansson wrote: >> On Fri, Sep 12, 2014 at 10:00:04PM +0800, Hanjun Guo wrote: >>> See also Documentation/power/runtime_pm.txt, pci=noacpi >>> >>> diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c >>> index 9252f72..693da7f 100644 >>> --- a/arch/arm64/kernel/acpi.c >>> +++ b/arch/arm64/kernel/acpi.c >>> @@ -67,3 +67,18 @@ void __init acpi_boot_table_init(void) >>> if (acpi_table_init()) >>> disable_acpi(); >>> } >>> + >>> +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 */ >> >> For symmetry, you should handle acpi=force here too (i.e. if someone >> disables by default, which I expect we'll ask for when this code is >> first merged). > > Does this mean you want another Kconfig option - ACPI_DEFAULT_OFF (which > would be set by default)? This would make sense. I mentioned this before since it gives distros an opportunity to set this differently for their shipping preference without the upstream having to default to being on. Jon. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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