[PATCH 5/5] ARM: gic: add OF based initialization

On Mon, Sep 19, 2011 at 11:47:18AM +0200, Cousson, Benoit wrote:

Since the cpumask is not relevant for the SPI, maybe having two  
interrupt controllers will be more relevant. Or maybe 3, since there is  
some SGIs as well.

I don't think anyone uses SGIs outside of the common SMP code.
Therefore they're handled entirely separately for the root GIC.

(If there's two GICs - some platforms do have two - then the SGIs on
the non-root GIC are unused.)