linux-kernel - Re: [PATCH v4 2/2] ARM: cpuidle: make arm_cpuidle

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Message-ID: <20160708141729.3fa61c10@xhacker>
Date:	Fri, 8 Jul 2016 14:17:29 +0800
From:	Jisheng Zhang <jszhang@...vell.com>
To:	Daniel Lezcano <daniel.lezcano@...aro.org>
CC:	<lorenzo.pieralisi@....com>, <lina.iyer@...aro.org>,
	<linux@...linux.org.uk>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 2/2] ARM: cpuidle: make arm_cpuidle_suspend() a bit
 more efficient

Dear Daniel,

On Thu, 7 Jul 2016 15:46:28 +0200 Daniel Lezcano wrote:

> On Wed, Jul 06, 2016 at 02:15:55PM +0800, Jisheng Zhang wrote:
> > Currently, we check cpuidle_ops.suspend every time when entering a
> > low-power idle state. But this check could be avoided in this hot path
> > by moving it into arm_cpuidle_read_ops() to reduce arm_cpuidle_suspend
> > overhead a bit.
> > 
> > Signed-off-by: Jisheng Zhang <jszhang@...vell.com>
> > ---  
> 
> Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>

I'm not sure the upstream merging path this patch should follow, Per my
understanding, I need to put it into Russell's PATCH system.

Thanks in advance,
Jisheng