linux-kernel - Re: [PATCH v4 01/15] ARM: export arm_pm

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Message-ID: <20190108233137.GW11171@n2100.armlinux.org.uk>
Date:   Tue, 8 Jan 2019 23:31:37 +0000
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Lubomir Rintel <lkundrak@...sk>
Cc:     Andy Shevchenko <andy@...radead.org>,
        Darren Hart <dvhart@...radead.org>,
        platform-driver-x86@...r.kernel.org,
        James Cameron <quozl@...top.org>,
        Mark Rutland <mark.rutland@....com>,
        Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
        Sebastian Reichel <sre@...nel.org>, x86@...nel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 01/15] ARM: export arm_pm_restart()

On Tue, Jan 08, 2019 at 06:58:04PM +0100, Lubomir Rintel wrote:
> The OLPC XO 1.75 laptop is rebooted with a command to the Embedded
> Controller. The EC driver should be a module, since most people don't need
> it to be compiled in.

Why do you need this - is there a reason why you can't hook onto the
restart_handler_list using register_restart_handler()?  The registered
handlers are passed the command.

I would rather this is not exported to modules, it is generally unsafe
to hook stuff by directly poking function pointers from module code.

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
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