linux-kernel - [tip: irq/core] genirq/manage: Rework irq_percpu_is

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Message-ID: <174660884255.406.15956923073834374847.tip-bot2@tip-bot2>
Date: Wed, 07 May 2025 09:07:22 -0000
From: "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Thomas Gleixner <tglx@...utronix.de>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org, maz@...nel.org
Subject: [tip: irq/core] genirq/manage: Rework irq_percpu_is_enabled()

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     b171f712d6ef1ae073d18e8ea9df1e96eb34f226
Gitweb:        https://git.kernel.org/tip/b171f712d6ef1ae073d18e8ea9df1e96eb34f226
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Tue, 29 Apr 2025 08:55:46 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Wed, 07 May 2025 09:08:16 +02:00

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>
Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lore.kernel.org/all/20250429065422.376836282@linutronix.de


---
 kernel/irq/manage.c | 16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index e27fa4e..3a491c7 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -2322,19 +2322,9 @@ void enable_percpu_nmi(unsigned int irq, unsigned int type)
  */
 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);