linux-kernel - Re: [PATCH 2/2] powerpc: change topology_init() to a subsys

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Date:	Thu, 3 May 2007 08:26:54 -0500
From:	Kevin Corry <kevcorry@...ibm.com>
To:	michael@...erman.id.au
Cc:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	Stephane Eranian <eranian@....hp.com>,
	Carl Love <carll@...ibm.com>
Subject: Re: [PATCH 2/2] powerpc: change topology_init() to a subsys_initcall

Hi Michael,

On Wed May 2 2007 8:11 pm, Michael Ellerman wrote:
> On Wed, 2007-05-02 at 12:11 -0500, Kevin Corry wrote:
> > Change the powerpc version of topology_init() from an __initcall to
> > a subsys_initcall to match all other architectures.
> >
> > Signed-off-by: Kevin Corry <kevcorry@...ibm.com>
> >
> > Index: linux-2.6.21/arch/powerpc/kernel/sysfs.c
> > ===================================================================
> > --- linux-2.6.21.orig/arch/powerpc/kernel/sysfs.c
> > +++ linux-2.6.21/arch/powerpc/kernel/sysfs.c
> > @@ -498,4 +498,4 @@ static int __init topology_init(void)
> >
> >  	return 0;
> >  }
> > -__initcall(topology_init);
> > +subsys_initcall(topology_init);
>
> topology_init() depends on the register_one_node() stuff being
> available, which relies on register_node_type() being called AFAICT -
> which is a postcore_initcall(). So that's OK.
>
> It also creates sysfs files, which is OK because long before initcalls
> run vfs_caches_init() called mnt_init() which called sysfs_init().
>
> Just to be super safe it'd be good to diff your sysfs before and after
> the change. But assuming that show's nothing this looks fine to me.

I booted with and without this patch applied, and the file listings of /sys on 
both kernels show no differences (other than timestamps).

Thanks for the feedback.
-- 
Kevin Corry
kevcorry@...ibm.com
http://www.ibm.com/linux/
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