linux-kernel - Re: [PATCH] ARM: imx: add cpuidle support for i.mx6ul

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Message-ID: <20160829072347.GJ30790@tiger>
Date:   Mon, 29 Aug 2016 15:23:47 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Lucas Stach <l.stach@...gutronix.de>,
        Yongcai Huang <anson.huang@....com>
Cc:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Fabio Estevam <fabio.estevam@....com>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>
Subject: Re: [PATCH] ARM: imx: add cpuidle support for i.mx6ul

On Wed, Aug 24, 2016 at 12:04:50PM +0200, Lucas Stach wrote:
> Personally I would just remove the condition, but if you are concerned
> about the double L1 flush overhead (I wouldn't worry about this, it
> should be negligible) you should really make this conditional on an
> architected L2 being present. Making it conditional on the outer cache
> being absent is confusing.

Anson,

Is there any concern or problem if we follow Lucas' suggestion to
unconditionally calls flush_cache_all() here?

Shawn