linux-kernel - Re: [PATCH 8/9] X86: remove redundant cpuidle_idle

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Message-ID: <52E61C20.50804@linaro.org>
Date:	Mon, 27 Jan 2014 09:43:12 +0100
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mundt <lethal@...ux-sh.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>
CC:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linuxppc-dev@...ts.ozlabs.org, linux-sh@...r.kernel.org,
	linux-pm@...r.kernel.org, linaro-kernel@...ts.linaro.org
Subject: Re: [PATCH 8/9] X86: remove redundant cpuidle_idle_call()

On 01/27/2014 07:08 AM, Nicolas Pitre wrote:
> The core idle loop now takes care of it.
>
> Signed-off-by: Nicolas Pitre <nico@...aro.org>

Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>

> ---
>   arch/x86/kernel/process.c | 5 +----
>   1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
> index 3fb8d95ab8..4505e2a950 100644
> --- a/arch/x86/kernel/process.c
> +++ b/arch/x86/kernel/process.c
> @@ -298,10 +298,7 @@ void arch_cpu_idle_dead(void)
>    */
>   void arch_cpu_idle(void)
>   {
> -	if (cpuidle_idle_call())
> -		x86_idle();
> -	else
> -		local_irq_enable();

For the record, it was pointless to enable the local irq here because it 
is handled by the cpuidle framework when exiting the idle state.

> +	x86_idle();
>   }
>
>   /*
>


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