linux-kernel - Re: [PATCH 1/1] x86

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Message-ID: <499728AC.90609@gmail.com>
Date:	Sat, 14 Feb 2009 21:25:16 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	lenb@...nel.org, mingo@...hat.com, linux-kernel@...r.kernel.org,
	Pavel Machek <pavel@...e.cz>
Subject: Re: [PATCH 1/1] x86_64: fix s3 fail path

Rafael J. Wysocki napsal(a):
> On Monday 09 February 2009, Jiri Slaby wrote:
>> As acpi_enter_sleep_state can fail, take this into account in
>> do_suspend_lowlevel and don't return to the do_suspend_lowlevel's
>> caller. This would break (currently) fpu status and preempt count.
>>
>> Technically, this means use `call' instead of `jmp' and `jmp' to
>> the `resume_point' after the `call' (i.e. if
>> acpi_enter_sleep_state returns=fails). `resume_point' will handle
>> the restore of fpu and preempt count gracefully.
>>
>> Signed-off-by: Jiri Slaby <jirislaby@...il.com>
>> Cc: Len Brown <lenb@...nel.org>
>> Cc: Pavel Machek <pavel@...e.cz>
>> Cc: Rafael J. Wysocki <rjw@...k.pl>
> 
> What kernel is this patch against?  It doesn't apply to the mainline.

It is applicable even after
[PATCH v2 1/1] x86_64: acpi/wakeup_64 cleanup
from
http://lkml.org/lkml/2009/2/7/101
which is not present anywhere so far.
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