linux-kernel - Re: [PATCH v5 0/7] kernel: Add support for restart handler call chain

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Message-ID: <20140721123056.GF12817@arm.com>
Date:	Mon, 21 Jul 2014 13:30:56 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	"linux-watchdog@...r.kernel.org" <linux-watchdog@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Wim Van Sebroeck <wim@...ana.be>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Will Deacon <Will.Deacon@....com>,
	Arnd Bergmann <arnd@...db.de>,
	Heiko Stuebner <heiko@...ech.de>,
	Russell King <linux@....linux.org.uk>,
	Jonas Jensen <jonas.jensen@...il.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...nel.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Tomasz Figa <t.figa@...sung.com>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 0/7] kernel: Add support for restart handler call chain

On Fri, Jul 18, 2014 at 08:34:09AM +0100, Guenter Roeck wrote:
> Patch 1 of this series implements the restart handler function. Patches 2 and 3
> implement calling the restart handler chain from arm and arm64 restart code.
> 
> Patch 4 modifies the restart-poweroff driver to no longer call arm_pm_restart
> directly but machine_restart. This is done to avoid calling arm_pm_restart
> from more than one place. The change makes the driver architecture independent,
> so it would be possible to drop the arm dependency from its Kconfig entry.
> 
> Patch 5 and 6 convert existing restart handlers in the watchdog subsystem
> to use the restart handler. Patch 7 unexports arm_pm_restart to ensure
> that no one gets the idea to implement a restart handler as module.

For the current patches:

Acked-by: Catalin Marinas <catalin.marinas@....com>

Do you plan to convert more of the power/drivers/reset/ code?

BTW, is it worth doing something similar for pm_power_off (there is
generic code calling it directly, so slightly more complicated than
pm_restart)?
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