On Tue, Jan 15, 2013 at 03:38:55PM +0800, Mike Qiu wrote:

Adding a function irq_create_mapping_many() which can associate
multiple MSIs to a continous irq mapping.

This is needed to enable multiple MSI support for pSeries.

+int irq_create_mapping_many(struct irq_domain *domain,
+		irq_hw_number_t hwirq_base, int count)
+{

Other than the other review comments already made, I think you can
simplify this considerably by simply doing what irq_create_strict_mappings() does,
and relaxing the irq_base requirements.

In any event, as you are creating a new interface, I don't think you want
to carry around half of the legacy crap that irq_create_mapping() has to
deal with. We made the decision to avoid this with irq_create_strict_mappings()
intentionally, too.