linux-kernel - [PATCH 16/25] genirq: Add request_percpu_irq

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Message-Id: <20250908163127.2462948-17-maz@kernel.org>
Date: Mon,  8 Sep 2025 17:31:18 +0100
From: Marc Zyngier <maz@...nel.org>
To: linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-acpi@...r.kernel.org
Cc: Thomas Gleixner <tglx@...utronix.de>,
	Mark Rutland <mark.rutland@....com>,
	Will Deacon <will@...nel.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Saravana Kannan <saravanak@...gle.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sven Peter <sven@...nel.org>,
	Janne Grunau <j@...nau.net>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	James Clark <james.clark@...aro.org>
Subject: [PATCH 16/25] genirq: Add request_percpu_irq_affinity() helper

While it would be nice to simply make request_percpu_irq() take
an affinity mask, the churn is likely to be on the irritating side
given that most drivers do not give a damn about affinities.

So take the more innocuous path to provide a helper that parallels
request_percpu_irq(), with an affinity as a bonus argument.

Yes, request_percpu_irq_affinity() is a bit of a mouthful.

Signed-off-by: Marc Zyngier <maz@...nel.org>
---
 include/linux/interrupt.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 2134e7c08c169..c8e6f4895782c 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -196,6 +196,15 @@ request_percpu_irq(unsigned int irq, irq_handler_t handler,
 				    devname, NULL, percpu_dev_id);
 }
 
+static inline int __must_check
+request_percpu_irq_affinity(unsigned int irq, irq_handler_t handler,
+			    const char *devname, const cpumask_t *affinity,
+			    void __percpu *percpu_dev_id)
+{
+	return __request_percpu_irq(irq, handler, 0,
+				    devname, affinity, percpu_dev_id);
+}
+
 extern int __must_check
 request_percpu_nmi(unsigned int irq, irq_handler_t handler, const char *devname,
 		   const struct cpumask *affinity, void __percpu *dev_id);
-- 
2.39.2