[tip: irq/core] genirq: Add request_percpu_irq_affinity() helper

tip-bot2 for Marc Zyngier
2025-10-27T16:31:06Z

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

Commit-ID: c734af3b2b95f0ac6ed87c50e7602a6beeaf534f
Gitweb: https://git.kernel.org/tip/c734af3b2b95f0ac6ed87c50e7602a6beeaf534f
Author: Marc Zyngier <maz@kernel.org>
AuthorDate: Mon, 20 Oct 2025 13:29:34 +01:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Mon, 27 Oct 2025 17:16:35 +01:00

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@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Will Deacon <will@kernel.org>
Link: https://patch.msgid.link/20251020122944.3074811-18-maz@kernel.org
---
include/linux/interrupt.h | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 81506ab..fa62ab5 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 *name,
const struct cpumask *affinity, void __percpu *dev_id);