[patch 27/50] genirq: ARM: dyntick quirk

[Ingo Molnar]

From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

ARM dyntick quirk.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
 kernel/irq/handle.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

Index: linux-genirq.q/kernel/irq/handle.c
===================================================================
--- linux-genirq.q.orig/kernel/irq/handle.c
+++ linux-genirq.q/kernel/irq/handle.c
@@ -16,6 +16,10 @@
 #include <linux/interrupt.h>
 #include <linux/kernel_stat.h>
 
+#if defined(CONFIG_NO_IDLE_HZ) && defined(CONFIG_ARM)
+#include <asm/dyntick.h>
+#endif
+
 #include "internals.h"
 
 /**
@@ -105,6 +109,15 @@ int handle_IRQ_event(unsigned int irq, s
 {
 	int ret, retval = 0, status = 0;
 
+#if defined(CONFIG_NO_IDLE_HZ) && defined(CONFIG_ARM)
+	if (!(action->flags & SA_TIMER) && system_timer->dyn_tick != NULL) {
+		write_seqlock(&xtime_lock);
+		if (system_timer->dyn_tick->state & DYN_TICK_ENABLED)
+			system_timer->dyn_tick->handler(irq, 0, regs);
+		write_sequnlock(&xtime_lock);
+	}
+#endif
+
 	if (!(action->flags & SA_INTERRUPT))
 		local_irq_enable();
 
-
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