From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 16 Aug 2019 18:09:23 +0200
Subject: genirq: Force interrupt threading on RT
Patch-mainline: v5.4-rc1
Git-commit: b6a32bbd8735def2d0d696ba59205d1874b7800f
References: bsc#1162702
Switch force_irqthreads from a boot time modifiable variable to a compile
time constant when CONFIG_PREEMPT_RT is enabled.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190816160923.12855-1-bigeasy@linutronix.de
Acked-by: Daniel Wagner <dwagner@suse.de>
---
include/linux/interrupt.h | 4 ++++
kernel/irq/manage.c | 2 +-
2 files changed, 5 insertions(+), 1 deletion(-)
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -472,7 +472,11 @@ extern int irq_set_irqchip_state(unsigne
bool state);
#ifdef CONFIG_IRQ_FORCED_THREADING
+# ifdef CONFIG_PREEMPT_RT
+# define force_irqthreads (true)
+# else
extern bool force_irqthreads;
+# endif
#else
#define force_irqthreads (0)
#endif
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -23,7 +23,7 @@
#include "internals.h"
-#ifdef CONFIG_IRQ_FORCED_THREADING
+#if defined(CONFIG_IRQ_FORCED_THREADING) && !defined(CONFIG_PREEMPT_RT)
__read_mostly bool force_irqthreads;
EXPORT_SYMBOL_GPL(force_irqthreads);