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

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Date:	Tue, 23 Jun 2009 08:59:33 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	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 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();

On Mon, 2009-06-22 at 19:29 -0700, Linus Torvalds wrote:
> 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?
> 
> When given the choice of simplifying and removing code, always do so. 
> 
> Static initializers are much nicer than having to worry about when 
> something gets initialized, no?

Looks good to me. Thanks for fixing it up, Linus!

			Pekka

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