[PATCH] ia64: simplify SN2 interrupt allocation

Same issues as the dma mapping code, but as SN2 interrupt handling is
totally static and all irqs are allocated on bootup an never freed it's
not a speed issue.

I really wonder what someone has to smoke to call a that expensive
dispatcher just to cast the data structure back to the lowlevel one
directly afterwards...

arch/ia64/sn/io/machvec/pci_bus_cvlink.c

@@ -426,7 +426,7 @@ sn_pci_fixup(int arg)
 	struct pci_dev *device_dev = NULL;
 	struct sn_widget_sysdata *widget_sysdata;
 	struct sn_device_sysdata *device_sysdata;
-	pciio_intr_t intr_handle;
+	pcibr_intr_t intr_handle;
 	int cpuid;
 	vertex_hdl_t device_vertex;
 	pciio_intr_line_t lines;
@@ -549,17 +549,17 @@ sn_pci_fixup(int arg)
 				     (unsigned char *)&lines);
 	 
 		irqpdaindr->curr = device_dev;
-		intr_handle = pciio_intr_alloc(device_vertex, NULL, lines, device_vertex);
+		intr_handle = pcibr_intr_alloc(device_vertex, NULL, lines, device_vertex);
 
-		irq = intr_handle->pi_irq;
+		irq = intr_handle->bi_irq;
 		irqpdaindr->device_dev[irq] = device_dev;
-		cpuid = intr_handle->pi_cpu;
-		pciio_intr_connect(intr_handle, (intr_func_t)0, (intr_arg_t)0);
+		cpuid = intr_handle->bi_cpu;
+		pcibr_intr_connect(intr_handle, (intr_func_t)0, (intr_arg_t)0);
 		device_dev->irq = irq;
-		register_pcibr_intr(irq, (pcibr_intr_t)intr_handle);
+		register_pcibr_intr(irq, intr_handle);
 
 		for (idx = 0; idx < PCI_ROM_RESOURCE; idx++) {
-			int ibits = ((pcibr_intr_t)intr_handle)->bi_ibits;
+			int ibits = intr_handle->bi_ibits;
 			int i;
 
 			size = device_dev->resource[idx].end -