[2.6.23-rc1 REGRESSION] ThinkPad T42 poweroff failure by "PM: Introduce pm_power_off_prepare"

[YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>]

Hello.

Linux 2.6.23-rc1 fails to power off my ThinkPad T42.
Git-bisect told me that the following commit is to blame,
and by reverting that commit, it works appropriately.

Regards,

--yoshfuji

bd804eba1c8597cbb7cd5a5f9fe886aae16a079a is first bad commit
commit bd804eba1c8597cbb7cd5a5f9fe886aae16a079a
Author: Rafael J. Wysocki <rjw@sisk.pl>
Date:   Thu Jul 19 01:47:40 2007 -0700

    PM: Introduce pm_power_off_prepare
    
    Introduce the pm_power_off_prepare() callback that can be registered by the
    interested platforms in analogy with pm_idle() and pm_power_off(), used for
    preparing the system to power off (needed by ACPI).
    
    This allows us to drop acpi_sysclass and device_acpi that are only defined in
    order to register the ACPI power off preparation callback, which is needed by
    pm_power_off() registered in a much different way.
    
    Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
    Acked-by: Pavel Machek <pavel@ucw.cz>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

:040000 040000 624870eb14bf9841fa2dca2cf13cc4c9a0479005 af79f843f3383bbecaed84d493926939cf0e1c12 M	drivers
:040000 040000 9b28a21970668ce133916bbe8d8fd4a61bce23d7 80fc84d7982369205dcf94029e3958c90db14bf0 M	include
:040000 040000 9ce5c8b5d3f87c121b2f7bc6e02bc814648a2739 2e2e1468dfa0db9dee5bd204fd3f802a975a6454 M	kernel

-- 
YOSHIFUJI Hideaki @ USAGI Project  <yoshfuji@linux-ipv6.org>
GPG-FP  : 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA
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