linux-kernel - Re: [patch 1/2] ACPI: disable lower idle C-states across suspend/resume

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Date:	01 Oct 2007 12:11:37 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...l.org>,
	Ingo Molnar <mingo@...e.hu>, Len Brown <lenb@...nel.org>,
	Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [patch 1/2] ACPI: disable lower idle C-states across suspend/resume

Thomas Gleixner <tglx@...utronix.de> writes:
>  
> +/*
> + * Suspend / resume control
> + */
> +static int acpi_idle_suspend;
> +
> +int acpi_processor_suspend(struct acpi_device * device, pm_message_t state)
> +{
> +	acpi_idle_suspend = 1;
> +	return 0;
> +}
> +
> +int acpi_processor_resume(struct acpi_device * device)
> +{
> +	acpi_idle_suspend = 0;
> +	return 0;
> +}

Instead of the ugly global variable you could you could just change 
pm_idle back to NULL (= default_idle) and then later restore it.

-Andi
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