linux-kernel - Re: [PATCH -mm] PM: Separate hibernation code from suspend code

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Date:	Fri, 4 May 2007 23:31:35 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Johannes Berg <johannes@...solutions.net>,
	LKML <linux-kernel@...r.kernel.org>, Pavel Machek <pavel@....cz>,
	Nigel Cunningham <nigel@...el.suspend2.net>,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: [PATCH -mm] PM: Separate hibernation code from suspend code

On Fri, 4 May 2007 11:32:31 +0200 "Rafael J. Wysocki" <rjw@...k.pl> wrote:

> Separate the hibernation (aka suspend to disk code) from the other suspend code.
> In particular:
>  * Remove the definitions related to hibernation from include/linux/pm.h
>  * Introduce struct hibernation_ops and a new hibernate() function to hibernate
>    the system, defined in include/linux/suspend.h
>  * Separate suspend code in kernel/power/main.c from hibernation-related code
>    in kernel/power/disk.c and kernel/power/user.c (with the help of
>    hibernation_ops)
>  * Switch ACPI (the only user of pm_ops.pm_disk_mode) to hibernation_ops

This causes the long-suffering Vaio to fail to power off during suspend
to disk.  It says "Please power me down manually".

<debugs a bit>

machine_ops.halt(); points at native_machine_halt(), which is a no-op.

However `halt -p' still works OK.  How come it is not similarly affected?
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