linux-kernel - Re: [patch 1/2] kcmp: Make it to depend on CONFIG

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Date:	Wed, 20 Feb 2013 01:54:32 +0400
From:	Cyrill Gorcunov <gorcunov@...nvz.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Michal Marek <mmarek@...e.cz>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	ebiederm@...ssion.com, xemul@...allels.com,
	Andrey Vagin <avagin@...nvz.org>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Glauber Costa <glommer@...allels.com>,
	Andi Kleen <andi@...stfloor.org>, Tejun Heo <tj@...nel.org>,
	Matt Helsley <matthltc@...ibm.com>,
	Pekka Enberg <penberg@...nel.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Vasiliy Kulikov <segoon@...nwall.com>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [patch 1/2] kcmp: Make it to depend on CONFIG_KCMP

On Tue, Feb 19, 2013 at 01:42:56PM -0800, Andrew Morton wrote:
> > Index: linux-2.6.git/kernel/Makefile
> > ===================================================================
> > --- linux-2.6.git.orig/kernel/Makefile
> > +++ linux-2.6.git/kernel/Makefile
> > @@ -25,9 +25,7 @@ endif
> >  obj-y += sched/
> >  obj-y += power/
> >  
> > -ifeq ($(CONFIG_CHECKPOINT_RESTORE),y)
> > -obj-$(CONFIG_X86) += kcmp.o
> > -endif
> > +obj-$(CONFIG_KCMP) += kcmp.o
> >  obj-$(CONFIG_FREEZER) += freezer.o
> >  obj-$(CONFIG_PROFILING) += profile.o
> >  obj-$(CONFIG_STACKTRACE) += stacktrace.o
> 
> This permits people to select kcmp with CONFIG_CHECKPOINT_RESTORE=n. 
> Is there any point in doing that?
> 
> What would be wrong with just doing
> 
> 	obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o

I think this syscall is usefull even without c/r stuff.
That's why I made it with separate config option.
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