linux-kernel - Re: [PATCH RFC] PM / Hibernate: no kernel_power_off when pm_power

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Message-ID: <20140416210901.GK24070@n2100.arm.linux.org.uk>
Date:	Wed, 16 Apr 2014 22:09:01 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
Cc:	Sebastian Capella <sebastian.capella@...aro.org>,
	Pavel Machek <pavel@....cz>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	Len Brown <len.brown@...el.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
Subject: Re: [PATCH RFC] PM / Hibernate: no kernel_power_off when
	pm_power_off NULL

On Wed, Apr 16, 2014 at 09:57:18PM +0100, One Thousand Gnomes wrote:
> > I'd say scrap (a) _unless_ we're going to add while (1) loops to all
> > the architectures.  Alternatively, we could just accept that
> > machine_power_off() may return and deal with that case (iow, not
> > crash) in generic code.
> 
> What would the right behaviour be
> 
> while(1);
> 
> isn't really nice behaviour on a modern device 

That's an entirely different question... one which also needs fixing
in the hibernate code.  We already know that cpu_relax() in there is
a good thing to do, so that would be a good start.

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