linux-kernel - Re: [PATCH] mm/init: cpu_hotplug_init() must be initialized before SLAB

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Date:	Mon, 22 Jun 2009 23:00:53 -0500
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Sachin Sant <sachinp@...ibm.com>
Subject: Re: [PATCH] mm/init: cpu_hotplug_init() must be initialized before
 SLAB

On Mon, 2009-06-22 at 19:29 -0700, Linus Torvalds wrote:
> 
> On Tue, 23 Jun 2009, Benjamin Herrenschmidt wrote:
> 
> > +	/*
> > +	 * This initializes the mutex used by get/put_online_cpus()
> > +	 * which is used by SLAB
> > +	 */
> > +	cpu_hotplug_init();
> 
> Oh fudge it.
> 
> Why not get rid of that stupid thing, rather than have that subtle 
> dependency and a comment for it.
> 
> IOW, does this simpler alternative also work?

Yes, works for me.

James


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