genirq: Force wrapped access to desc->status in core code

Force the usage of wrappers by another nasty CPP substitution.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

kernel/irq/handle.c

@@ -55,7 +55,7 @@ irqreturn_t
 handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action)
 {
 	irqreturn_t ret, retval = IRQ_NONE;
-	unsigned int status = 0, irq = desc->irq_data.irq;
+	unsigned int random = 0, irq = desc->irq_data.irq;
 
 	do {
 		trace_irq_handler_entry(irq, action);
@@ -98,7 +98,7 @@ handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action)
 
 			/* Fall through to add to randomness */
 		case IRQ_HANDLED:
-			status |= action->flags;
+			random |= action->flags;
 			break;
 
 		default:
@@ -109,7 +109,7 @@ handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action)
 		action = action->next;
 	} while (action);
 
-	if (status & IRQF_SAMPLE_RANDOM)
+	if (random & IRQF_SAMPLE_RANDOM)
 		add_interrupt_randomness(irq);
 
 	if (!noirqdebug)

kernel/irq/irqdesc.c

@@ -79,7 +79,7 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node)
 	desc->irq_data.chip_data = NULL;
 	desc->irq_data.handler_data = NULL;
 	desc->irq_data.msi_desc = NULL;
-	desc->status = _IRQ_DEFAULT_INIT_FLAGS;
+	irq_settings_clr_and_set(desc, ~0, _IRQ_DEFAULT_INIT_FLAGS);
 	desc->istate = IRQS_DISABLED;
 	desc->handle_irq = handle_bad_irq;
 	desc->depth = 1;
@@ -247,7 +247,6 @@ int __init early_irq_init(void)
 
 struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
 	[0 ... NR_IRQS-1] = {
-		.status		= _IRQ_DEFAULT_INIT_FLAGS,
 		.istate		= IRQS_DISABLED,
 		.handle_irq	= handle_bad_irq,
 		.depth		= 1,
@@ -271,6 +270,7 @@ int __init early_irq_init(void)
 		desc[i].irq_data.irq = i;
 		desc[i].irq_data.chip = &no_irq_chip;
 		desc[i].kstat_irqs = alloc_percpu(unsigned int);
+		irq_settings_clr_and_set(desc, ~0, _IRQ_DEFAULT_INIT_FLAGS);
 		alloc_masks(desc + i, GFP_KERNEL, node);
 		desc_smp_init(desc + i, node);
 		lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);

kernel/irq/settings.h

@@ -148,3 +148,6 @@ static inline bool irq_settings_is_nested_thread(struct irq_desc *desc)
 {
 	return desc->status & _IRQ_NESTED_THREAD;
 }
+
+/* Nothing should touch desc->status from now on */
+#define status		USE_THE_PROPER_WRAPPERS_YOU_MORON