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genirq: Force interrupt threading on RT

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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
This commit is contained in:
Thomas Gleixner 2019-08-16 18:09:23 +02:00
parent d1abaeb3be
commit b6a32bbd87
2 changed files with 5 additions and 1 deletions
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4
include/linux/interrupt.h
View file

@ -472,7 +472,11 @@ extern int irq_set_irqchip_state(unsigned int irq, enum irqchip_irq_state which,
bool state); bool state);
#ifdef CONFIG_IRQ_FORCED_THREADING #ifdef CONFIG_IRQ_FORCED_THREADING
# ifdef CONFIG_PREEMPT_RT
# define force_irqthreads (true)
# else
extern bool force_irqthreads; extern bool force_irqthreads;
# endif
#else #else
#define force_irqthreads (0) #define force_irqthreads (0)
#endif #endif

2
kernel/irq/manage.c
View file

@ -23,7 +23,7 @@
#include "internals.h" #include "internals.h"
#ifdef CONFIG_IRQ_FORCED_THREADING #if defined(CONFIG_IRQ_FORCED_THREADING) && !defined(CONFIG_PREEMPT_RT)
__read_mostly bool force_irqthreads; __read_mostly bool force_irqthreads;
EXPORT_SYMBOL_GPL(force_irqthreads); EXPORT_SYMBOL_GPL(force_irqthreads);