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From: Rusty Russell <rusty@rustcorp.com.au>
To: Milton Miller <miltonm@bga.com>
Subject: Re: cpumask: fix compat getaffinity
Date: Wed, 23 Jun 2010 09:00:29 +0930
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Cc: Arnd Bergmann <arnd@arndb.de>,
       KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
       Greg KH <greg@kroah.com>, linux-kernel@vger.kernel.org
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On Wed, 12 May 2010 06:00:45 pm Milton Miller wrote:
> 
> At least for parsing, we need to allocate and parse NR_CPUS until
> all places like arch/powerpc/platforms/pseries/xics.c that compare a
> user-supplied mask to CPUMASK_ALL are eliminated.

Hi, this has been bugging me...

We're OK in this case: cpumask_equal() will only iterate to nr_cpus.  That's
one reason for all the cpumask churn...

I'm about to submit the cpumask shrinkage to Ingo.  I'll cc you...

Cheers,
Rusty.