genirq: Reuse irq_is_nmi()

Move irq_is_nmi() to the internal header file and reuse it all over the
place.

Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240423024037.3331215-1-ruanjinjie@huawei.com

Author: Jinjie Ruan

kernel/irq/internals.h

@@ -280,6 +280,11 @@ static inline int irq_desc_is_chained(struct irq_desc *desc)
 	return (desc->action && desc->action == &chained_action);
 }
 
+static inline bool irq_is_nmi(struct irq_desc *desc)
+{
+	return desc->istate & IRQS_NMI;
+}
+
 #ifdef CONFIG_PM_SLEEP
 bool irq_pm_check_wakeup(struct irq_desc *desc);
 void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action);

kernel/irq/irqdesc.c

@@ -965,11 +965,6 @@ unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
 	return desc && desc->kstat_irqs ? per_cpu(desc->kstat_irqs->cnt, cpu) : 0;
 }
 
-static bool irq_is_nmi(struct irq_desc *desc)
-{
-	return desc->istate & IRQS_NMI;
-}
-
 unsigned int kstat_irqs_desc(struct irq_desc *desc, const struct cpumask *cpumask)
 {
 	unsigned int sum = 0;

kernel/irq/manage.c

@@ -564,7 +564,7 @@ irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify)
 	/* The release function is promised process context */
 	might_sleep();
 
-	if (!desc || desc->istate & IRQS_NMI)
+	if (!desc || irq_is_nmi(desc))
 		return -EINVAL;
 
 	/* Complete initialisation of *notify */
@@ -902,7 +902,7 @@ int irq_set_irq_wake(unsigned int irq, unsigned int on)
 		return -EINVAL;
 
 	/* Don't use NMIs as wake up interrupts please */
-	if (desc->istate & IRQS_NMI) {
+	if (irq_is_nmi(desc)) {
 		ret = -EINVAL;
 		goto out_unlock;
 	}
@@ -1628,7 +1628,7 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
 		 */
 		unsigned int oldtype;
 
-		if (desc->istate & IRQS_NMI) {
+		if (irq_is_nmi(desc)) {
 			pr_err("Invalid attempt to share NMI for %s (irq %d) on irqchip %s.\n",
 				new->name, irq, desc->irq_data.chip->name);
 			ret = -EINVAL;
@@ -2081,7 +2081,7 @@ const void *free_nmi(unsigned int irq, void *dev_id)
 	unsigned long flags;
 	const void *devname;
 
-	if (!desc || WARN_ON(!(desc->istate & IRQS_NMI)))
+	if (!desc || WARN_ON(!irq_is_nmi(desc)))
 		return NULL;
 
 	if (WARN_ON(irq_settings_is_per_cpu_devid(desc)))
@@ -2547,7 +2547,7 @@ void free_percpu_nmi(unsigned int irq, void __percpu *dev_id)
 	if (!desc || !irq_settings_is_per_cpu_devid(desc))
 		return;
 
-	if (WARN_ON(!(desc->istate & IRQS_NMI)))
+	if (WARN_ON(!irq_is_nmi(desc)))
 		return;
 
 	kfree(__free_percpu_irq(irq, dev_id));
@@ -2683,7 +2683,7 @@ int request_percpu_nmi(unsigned int irq, irq_handler_t handler,
 		return -EINVAL;
 
 	/* The line cannot already be NMI */
-	if (desc->istate & IRQS_NMI)
+	if (irq_is_nmi(desc))
 		return -EINVAL;
 
 	action = kzalloc(sizeof(struct irqaction), GFP_KERNEL);
@@ -2744,7 +2744,7 @@ int prepare_percpu_nmi(unsigned int irq)
 	if (!desc)
 		return -EINVAL;
 
-	if (WARN(!(desc->istate & IRQS_NMI),
+	if (WARN(!irq_is_nmi(desc),
 		 KERN_ERR "prepare_percpu_nmi called for a non-NMI interrupt: irq %u\n",
 		 irq)) {
 		ret = -EINVAL;
@@ -2786,7 +2786,7 @@ void teardown_percpu_nmi(unsigned int irq)
 	if (!desc)
 		return;
 
-	if (WARN_ON(!(desc->istate & IRQS_NMI)))
+	if (WARN_ON(!irq_is_nmi(desc)))
 		goto out;
 
 	irq_nmi_teardown(desc);

kernel/irq/resend.c

@@ -190,7 +190,7 @@ int irq_inject_interrupt(unsigned int irq)
 	 *  - not NMI type
 	 *  - activated
 	 */
-	if ((desc->istate & IRQS_NMI) || !irqd_is_activated(&desc->irq_data))
+	if (irq_is_nmi(desc) || !irqd_is_activated(&desc->irq_data))
 		err = -EINVAL;
 	else
 		err = check_irq_resend(desc, true);