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

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Message-ID: <20160708105012.GA32305@linaro.org>
Date:	Fri, 8 Jul 2016 12:50:12 +0200
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Jisheng Zhang <jszhang@...vell.com>
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

On Fri, Jul 08, 2016 at 02:17:29PM +0800, Jisheng Zhang wrote:
> 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.

Or alternatively through arm-soc

  -- Daniel