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From: David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
Subject: Re: [PATCH v3] of: Create asm-generic/of.h and provide default
	of_node_to_nid()
Date: Mon, 26 Jul 2010 18:38:08 -0700 (PDT)
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From: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Date: Mon, 26 Jul 2010 16:51:01 -0600

> Indeed.  I looked at it briefly, but it wasn't immediately clear what
> the impact would be to switch powerpc over to -1, and it looked to me
> like sparc depends on -1 to signify no node association.

Kernel wide, NUMA interfaces tend to take "-1" to mean "any node."

I had looked over the powerpc cases, and besides 1 or 2 strange
locations the powerpc call sites were ready to handle -1.