linux-kernel - RE: [PATCH v1 3/3] ARM: tegra: cpuidle driver for tegra

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Date:	Fri, 27 Jan 2012 06:59:03 +0000
From:	"Bedia, Vaibhav" <vaibhav.bedia@...com>
To:	Peter De Schrijver <pdeschrijver@...dia.com>
CC:	Russell King <linux@....linux.org.uk>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	Colin Cross <ccross@...roid.com>,
	Olof Johansson <olof@...om.net>,
	Stephen Warren <swarren@...dia.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH v1 3/3] ARM: tegra: cpuidle driver for tegra

On Thu, Jan 26, 2012 at 21:52:03, Peter De Schrijver wrote:
[...]
> +static int tegra_idle_enter_lp3(struct cpuidle_device *dev,
> +	struct cpuidle_driver *drv, int index)
> +{
> +	ktime_t enter, exit;
> +	s64 us;
> +
> +	local_irq_disable();
> +	local_fiq_disable();
> +
> +	enter = ktime_get();
> +
> +	tegra_cpu_wfi();
> +
> +	exit = ktime_sub(ktime_get(), enter);
> +	us = ktime_to_us(exit);
> +
> +	local_fiq_enable();
> +	local_irq_enable();
> +
> +	dev->last_residency = us;
> +
> +	return index;
> +}

You can probably drop local_irq_disable() and local_irq_enable().
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