1 files changed, 54 insertions, 0 deletions
diff --git a/debian/patches-rt/0071-genirq-Force-interrupt-thread-on-RT.patch b/debian/patches-rt/0071-genirq-Force-interrupt-thread-on-RT.patch
new file mode 100644
index 000000000..9eb44beb4
--- /dev/null
+++ b/debian/patches-rt/0071-genirq-Force-interrupt-thread-on-RT.patch
@@ -0,0 +1,54 @@
+From d4c832ada3bdbd395d69e11232761697f6ed9523 Mon Sep 17 00:00:00 2001
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Sun, 3 Apr 2011 11:57:29 +0200
+Subject: [PATCH 071/347] genirq: Force interrupt thread on RT
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz
+
+Force threaded_irqs and optimize the code (force_irqthreads) in regard
+to this.
+
+Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
+---
+ include/linux/interrupt.h | 4 ++++
+ kernel/irq/manage.c       | 2 ++
+ 2 files changed, 6 insertions(+)
+
+diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
+index eeceac3376fc..315f852b4981 100644
+--- a/include/linux/interrupt.h
++++ b/include/linux/interrupt.h
+@@ -427,7 +427,11 @@ extern int irq_set_irqchip_state(unsigned int irq, enum irqchip_irq_state which,
+ 				 bool state);
+ 
+ #ifdef CONFIG_IRQ_FORCED_THREADING
++# ifdef CONFIG_PREEMPT_RT_BASE
++#  define force_irqthreads	(true)
++# else
+ extern bool force_irqthreads;
++# endif
+ #else
+ #define force_irqthreads	(0)
+ #endif
+diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
+index 18f3cdbf41fd..f12f50f5b605 100644
+--- a/kernel/irq/manage.c
++++ b/kernel/irq/manage.c
+@@ -24,6 +24,7 @@
+ #include "internals.h"
+ 
+ #ifdef CONFIG_IRQ_FORCED_THREADING
++# ifndef CONFIG_PREEMPT_RT_BASE
+ __read_mostly bool force_irqthreads;
+ EXPORT_SYMBOL_GPL(force_irqthreads);
+ 
+@@ -33,6 +34,7 @@ static int __init setup_forced_irqthreads(char *arg)
+ 	return 0;
+ }
+ early_param("threadirqs", setup_forced_irqthreads);
++# endif
+ #endif
+ 
+ static void __synchronize_hardirq(struct irq_desc *desc, bool sync_chip)
+-- 
+2.36.1
+