x86, ioapic: Consolidate gsi routing info into 'struct ioapic'

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: daniel.blueman@gmail.com
Link: http://lkml.kernel.org/r/20110518233157.994002011@sbsiddha-MOBL3.sc.intel.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index f06494e..690bc84 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -369,6 +369,7 @@
 static int ioapic_xlate(struct irq_domain *id, const u32 *intspec, u32 intsize,
 			u32 *out_hwirq, u32 *out_type)
 {
+	struct mp_ioapic_gsi *gsi_cfg;
 	struct io_apic_irq_attr attr;
 	struct of_ioapic_type *it;
 	u32 line, idx, type;
@@ -378,7 +379,8 @@
 
 	line = *intspec;
 	idx = (u32) id->priv;
-	*out_hwirq = line + mp_gsi_routing[idx].gsi_base;
+	gsi_cfg = mp_ioapic_gsi_routing(idx);
+	*out_hwirq = line + gsi_cfg->gsi_base;
 
 	intspec++;
 	type = *intspec;