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

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Message-ID: <174660884804.406.7984513943448248677.tip-bot2@tip-bot2>
Date: Wed, 07 May 2025 09:07:28 -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_apply_affinity_hint()

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

Commit-ID:     7e04e5c6f6158d5528f0591cc6b3fc1a2b771a90
Gitweb:        https://git.kernel.org/tip/7e04e5c6f6158d5528f0591cc6b3fc1a2b771a90
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Tue, 29 Apr 2025 08:55:34 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Wed, 07 May 2025 09:08:15 +02:00

genirq/manage: Rework __irq_apply_affinity_hint()

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/20250429065421.897188799@linutronix.de


---
 kernel/irq/manage.c | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 81f786d..4d08a09 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -480,26 +480,24 @@ int irq_force_affinity(unsigned int irq, const struct cpumask *cpumask)
 }
 EXPORT_SYMBOL_GPL(irq_force_affinity);
 
-int __irq_apply_affinity_hint(unsigned int irq, const struct cpumask *m,
-			      bool setaffinity)
+int __irq_apply_affinity_hint(unsigned int irq, const struct cpumask *m, bool setaffinity)
 {
-	unsigned long flags;
-	struct irq_desc *desc = irq_get_desc_lock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
+	int ret = -EINVAL;
 
-	if (!desc)
-		return -EINVAL;
-	desc->affinity_hint = m;
-	irq_put_desc_unlock(desc, flags);
-	if (m && setaffinity)
+	scoped_irqdesc_get_and_lock(irq, IRQ_GET_DESC_CHECK_GLOBAL) {
+		scoped_irqdesc->affinity_hint = m;
+		ret = 0;
+	}
+
+	if (!ret && m && setaffinity)
 		__irq_set_affinity(irq, m, false);
-	return 0;
+	return ret;
 }
 EXPORT_SYMBOL_GPL(__irq_apply_affinity_hint);
 
 static void irq_affinity_notify(struct work_struct *work)
 {
-	struct irq_affinity_notify *notify =
-		container_of(work, struct irq_affinity_notify, work);
+	struct irq_affinity_notify *notify = container_of(work, struct irq_affinity_notify, work);
 	struct irq_desc *desc = irq_to_desc(notify->irq);
 	cpumask_var_t cpumask;