x86/irq: Consolidate UV domain allocation

Move the UV specific fields into their own struct for readability sake. Get
rid of the #ifdeffery as it does not matter at all whether the alloc info
is a couple of bytes longer or not.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20200826112332.255792469@linutronix.de

arch/x86/include/asm/hw_irq.h

@@ -53,6 +53,14 @@ struct ioapic_alloc_info {
 	struct IO_APIC_route_entry	*entry;
 };
 
+struct uv_alloc_info {
+	int		limit;
+	int		blade;
+	unsigned long	offset;
+	char		*name;
+
+};
+
 /**
  * irq_alloc_info - X86 specific interrupt allocation info
  * @type:	X86 specific allocation type
@@ -64,7 +72,8 @@ struct ioapic_alloc_info {
  * @data:	Allocation specific data
  *
  * @ioapic:	IOAPIC specific allocation data
- */
+ * @uv:		UV specific allocation data
+*/
 struct irq_alloc_info {
 	enum irq_alloc_type	type;
 	u32			flags;
@@ -76,20 +85,14 @@ struct irq_alloc_info {
 
 	union {
 		struct ioapic_alloc_info	ioapic;
+		struct uv_alloc_info		uv;
+
 		int		unused;
 #ifdef	CONFIG_PCI_MSI
 		struct {
 			struct pci_dev	*msi_dev;
 			irq_hw_number_t	msi_hwirq;
 		};
-#endif
-#ifdef	CONFIG_X86_UV
-		struct {
-			int		uv_limit;
-			int		uv_blade;
-			unsigned long	uv_offset;
-			char		*uv_name;
-		};
 #endif
 	};
 };

arch/x86/platform/uv/uv_irq.c

@@ -90,15 +90,15 @@ static int uv_domain_alloc(struct irq_domain *domain, unsigned int virq,
 
 	ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg);
 	if (ret >= 0) {
-		if (info->uv_limit == UV_AFFINITY_CPU)
+		if (info->uv.limit == UV_AFFINITY_CPU)
 			irq_set_status_flags(virq, IRQ_NO_BALANCING);
 		else
 			irq_set_status_flags(virq, IRQ_MOVE_PCNTXT);
 
-		chip_data->pnode = uv_blade_to_pnode(info->uv_blade);
-		chip_data->offset = info->uv_offset;
+		chip_data->pnode = uv_blade_to_pnode(info->uv.blade);
+		chip_data->offset = info->uv.offset;
 		irq_domain_set_info(domain, virq, virq, &uv_irq_chip, chip_data,
-				    handle_percpu_irq, NULL, info->uv_name);
+				    handle_percpu_irq, NULL, info->uv.name);
 	} else {
 		kfree(chip_data);
 	}
@@ -193,10 +193,10 @@ int uv_setup_irq(char *irq_name, int cpu, int mmr_blade,
 
 	init_irq_alloc_info(&info, cpumask_of(cpu));
 	info.type = X86_IRQ_ALLOC_TYPE_UV;
-	info.uv_limit = limit;
-	info.uv_blade = mmr_blade;
-	info.uv_offset = mmr_offset;
-	info.uv_name = irq_name;
+	info.uv.limit = limit;
+	info.uv.blade = mmr_blade;
+	info.uv.offset = mmr_offset;
+	info.uv.name = irq_name;
 
 	return irq_domain_alloc_irqs(domain, 1,
 				     uv_blade_to_memory_nid(mmr_blade), &info);