From 602e4e433d3e7dbb03d4fd30a4720a02cdeca6aa Mon Sep 17 00:00:00 2001
From: "Bjoern A. Zeeb" <bz@FreeBSD.org>
Date: Mon, 24 May 2021 18:14:37 +0000
Subject: [PATCH] LinuxKPI: add irq_set_affinity_hint()

Add an implementation for irq_set_affinity_hint() to linux/interrupt.h
and include linux/hardirq.h for synchronize_irq() as needed by
wireless drivers.

Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Reviewed by:	hselasky
Differential Revision: https://reviews.freebsd.org/D30427
---
 .../linuxkpi/common/include/linux/interrupt.h    | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/interrupt.h b/sys/compat/linuxkpi/common/include/linux/interrupt.h
index fc1241240b39..90994a2f2315 100644
--- a/sys/compat/linuxkpi/common/include/linux/interrupt.h
+++ b/sys/compat/linuxkpi/common/include/linux/interrupt.h
@@ -31,12 +31,15 @@
 #ifndef	_LINUX_INTERRUPT_H_
 #define	_LINUX_INTERRUPT_H_
 
+#include <linux/cpu.h>
 #include <linux/device.h>
 #include <linux/pci.h>
 #include <linux/irqreturn.h>
+#include <linux/hardirq.h>
 
 #include <sys/bus.h>
 #include <sys/rman.h>
+#include <sys/interrupt.h>
 
 typedef	irqreturn_t	(*irq_handler_t)(int, void *);
 
@@ -183,6 +186,19 @@ free_irq(unsigned int irq, void *device)
 	kfree(irqe);
 }
 
+static inline int
+irq_set_affinity_hint(int vector, cpumask_t *mask)
+{
+	int error;
+
+	if (mask != NULL)
+		error = intr_setaffinity(vector, CPU_WHICH_IRQ, mask);
+	else
+		error = intr_setaffinity(vector, CPU_WHICH_IRQ, cpuset_root);
+
+	return (-error);
+}
+
 /*
  * LinuxKPI tasklet support
  */