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Date: Wed, 20 Feb 2013 01:54:32 +0400
From: Cyrill Gorcunov <gorcunov@openvz.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Michal Marek <mmarek@suse.cz>,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
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        Glauber Costa <glommer@parallels.com>,
        Andi Kleen <andi@firstfloor.org>, Tejun Heo <tj@kernel.org>,
        Matt Helsley <matthltc@us.ibm.com>, Pekka Enberg <penberg@kernel.org>,
        Eric Dumazet <eric.dumazet@gmail.com>,
        Vasiliy Kulikov <segoon@openwall.com>,
        Alexey Dobriyan <adobriyan@gmail.com>,
        Frederic Weisbecker <fweisbec@gmail.com>
Subject: Re: [patch 1/2] kcmp: Make it to depend on CONFIG_KCMP
Message-ID: <20130219215432.GP20312@moon>
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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.