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Subject: Re: [PATCH 1/2] powerpc: Add spinlock to request_phb_iospace()
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Stephen Rothwell <sfr@canb.auug.org.au>
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Date: Tue, 15 May 2007 16:02:50 +1000
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On Tue, 2007-05-15 at 14:26 +1000, Stephen Rothwell wrote:
> On Tue, 15 May 2007 14:16:26 +1000 Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
> >
> > request_phb_iospace() can be called from different CPUs at init
> > time (at least with my next patch) and thus needs a spinlock. As
> > for the next patch, this is a temporary workaround for 2.6.22
> > issues until my rewrite of IO mappings is ready (for 2.6.23)
> 
> What problem is this solving?

See the description of the next patch.

Ben.