linux-kernel - Re: [PATCH v6 00/48] kernel: Add support for power-off handler call chain

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Date:	Tue, 11 Nov 2014 10:20:23 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	Pavel Machek <pavel@....cz>
Cc:	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	Alan Cox <gnomes@...rguk.ukuu.org.uk>,
	Alexander Graf <agraf@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Heiko Stuebner <heiko@...ech.de>, LeeJon@...ck-us.net
Subject: Re: [PATCH v6 00/48] kernel: Add support for power-off handler call
 chain

On Mon, Nov 10, 2014 at 09:33:48AM +0100, Pavel Machek wrote:
> Hi!
> 
> > Introduce a system power-off handler call chain to solve the described
> > problems.  This call chain is expected to be executed from the architecture
> > specific machine_power_off() function.  Drivers providing system power-off
> > functionality are expected to register with this call chain.  By using the
> > priority field in the notifier block, callers can control power-off
> > handler
> 
> Linus rather disliked the idea of notifier chains for this... And I
> don't see how it got addressed.
> 
Hi all,

After more thought, I concluded that it is technically impossible to support
multiple power-off handlers without some kind of list or call chain, no matter
how it is called. Given the opposition from Linus and the power maintainers
to the series, I decided to shelf it.

Thanks,
Guenter
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