linux-kernel - Re: prctl(PR_SET

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Date:	Wed, 20 Feb 2013 22:16:16 +1100 (EST)
From:	u3557@...o.sublimeip.com (Amnon Shiloh)
To:	gorcunov@...nvz.org (Cyrill Gorcunov)
Cc:	rostedt@...dmis.org (Steven Rostedt), u3557@...lix.com.au,
	oleg@...hat.com (Oleg Nesterov), palves@...hat.com (Pedro Alves),
	dvlasenk@...hat.com (Denys Vlasenko),
	jan.kratochvil@...hat.com (Jan Kratochvil),
	xemul@...allels.com (Pavel Emelyanov),
	fweisbec@...il.com (Frederic Weisbecker),
	mingo@...hat.com (Ingo Molnar),
	a.p.zijlstra@...llo.nl (Peter Zijlstra),
	linux-kernel@...r.kernel.org
Subject: Re: prctl(PR_SET_MM)

Hi Cyrill,

Cyrill Gorcunov wrote:

> I see. Thanks for explanation! Thus we need some new config option which would
> enable this prctl opcodes (y by default), in turn config-checkpoint-restore
> kconfig option need to select this feature if set. Sounds reasonable?

Yes, This would be one possible way to do it.
Another possibility is to not have an #ifdef at all around this code.
Another possibility is to have a dual #if:

#if defined(CONFIG_CHECKPOINT_RESTORE) || defined(CONFIG_MM_FIELDS_SETTING)

Best Regards,
Amnon.
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