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From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 3 Apr 2011 11:57:29 +0200
Subject: [PATCH 071/342] genirq: Force interrupt thread on RT
Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=9ed3c480f56be478ccd03c80943df887b0e0baa6
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)
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