linux-kernel - Re: [PATCH] create CONFIG_SUSPEND_UP

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Message-ID: <20070731063833.GD22419@elf.ucw.cz>
Date:	Tue, 31 Jul 2007 08:38:33 +0200
From:	Pavel Machek <pavel@....cz>
To:	Len Brown <lenb@...nel.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, david@...g.hm,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Adrian Bunk <bunk@...sta.de>,
	Stefan Richter <stefanr@...6.in-berlin.de>,
	Nigel Cunningham <nigel@...el.suspend2.net>,
	pm list <linux-pm@...ts.linux-foundation.org>
Subject: Re: [PATCH] create CONFIG_SUSPEND_UP_POSSIBLE

Hi!

> Without this change, it is possible to build CONFIG_HIBERNATE
> on all !SMP architectures, but not necessarily their SMP versions.

Did you want to say "CONFIG_SUSPEND"?

> I don't know for sure if the architecture list under SUSPEND_UP_POSSIBLE
> is correct.  For now it simply matches the list for
> SUSPEND_SMP_POSSIBLE.

I do not think it is.

> Signed-off-by: Len Brown <len.brown@...el.com>
> ---
>  Kconfig |    7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
> index 412859f..ccf6576 100644
> --- a/kernel/power/Kconfig
> +++ b/kernel/power/Kconfig
> @@ -72,6 +72,11 @@ config PM_TRACE
>  	CAUTION: this option will cause your machine's real-time clock to be
>  	set to an invalid time after a resume.
>  
> +config SUSPEND_UP_POSSIBLE
> +	bool
> +	depends on (X86 && !X86_VOYAGER) || (PPC64 && (PPC_PSERIES ||

At least ARM can do suspend, too... probably others. I was under
impression that SUSPEND is "supported" by all the architectures, just
some of them veto it at runtime (using pm_ops or how was it renamed).
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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