linux-kernel - [patch 40/46] genirq/manage: Rework irq_percpu_is

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Message-ID: <20250313155916.593648845@linutronix.de>
Date: Thu, 13 Mar 2025 17:00:51 +0100 (CET)
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: Peter Zijlstra <peterz@...radead.org>,
 Jiri Slaby <jirislaby@...nel.org>
Subject: [patch 40/46] genirq/manage: Rework irq_percpu_is_enabled()

Use the new guards to get and lock the interrupt descriptor and tidy up the
code.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 kernel/irq/manage.c |   16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -2321,19 +2321,9 @@ void enable_percpu_nmi(unsigned int irq,
  */
 bool irq_percpu_is_enabled(unsigned int irq)
 {
-	unsigned int cpu = smp_processor_id();
-	struct irq_desc *desc;
-	unsigned long flags;
-	bool is_enabled;
-
-	desc = irq_get_desc_lock(irq, &flags, IRQ_GET_DESC_CHECK_PERCPU);
-	if (!desc)
-		return false;
-
-	is_enabled = cpumask_test_cpu(cpu, desc->percpu_enabled);
-	irq_put_desc_unlock(desc, flags);
-
-	return is_enabled;
+	scoped_irqdesc_get_and_lock(irq, IRQ_GET_DESC_CHECK_PERCPU)
+		return cpumask_test_cpu(smp_processor_id(), scoped_irqdesc->percpu_enabled);
+	return false;
 }
 EXPORT_SYMBOL_GPL(irq_percpu_is_enabled);