[PATCH] genirq: ARM dyntick cleanup

Linus: "The hacks in kernel/irq/handle.c are really horrid. REALLY
horrid."

They are indeed. Move the dyntick quirks to ARM where they belong.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

4 files changed, 17 insertions, 12 deletions

diff --git a/include/asm-arm/hw_irq.h b/include/asm-arm/hw_irq.h
index f1a08a500604..275b574fd1a5 100644
--- a/include/asm-arm/hw_irq.h
+++ b/include/asm-arm/hw_irq.h
@@ -6,4 +6,15 @@
 
 #include <asm/mach/irq.h>
 
+#if defined(CONFIG_NO_IDLE_HZ)
+# include <asm/dyntick.h>
+# define handle_dynamic_tick(action)                                    \
+        if (!(action->flags & SA_TIMER) && system_timer->dyn_tick) {    \
+                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
+
 #endif
diff --git a/include/asm-arm/mach/time.h b/include/asm-arm/mach/time.h
index 9f28073559e8..dee0bc336fe8 100644
--- a/include/asm-arm/mach/time.h
+++ b/include/asm-arm/mach/time.h
@@ -69,6 +69,7 @@ extern void timer_tick(struct pt_regs *);
 /*
  * Kernel time keeping support.
  */
+struct timespec;
 extern int (*set_rtc)(void);
 extern void save_time_delta(struct timespec *delta, struct timespec *rtc);
 extern void restore_time_delta(struct timespec *delta, struct timespec *rtc);
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 95d7aa7954d2..b48eae32dc61 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -182,6 +182,10 @@ extern int setup_irq(unsigned int irq, struct irqaction *new);
 
 #ifdef CONFIG_GENERIC_HARDIRQS
 
+#ifndef handle_dynamic_tick
+# define handle_dynamic_tick(a)         do { } while (0)
+#endif
+
 #ifdef CONFIG_SMP
 static inline void set_native_irq_info(int irq, cpumask_t mask)
 {
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 6d8b30114961..aeb6e391276c 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -16,10 +16,6 @@
 #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"
 
 /**
@@ -133,14 +129,7 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
         irqreturn_t ret, retval = IRQ_NONE;
         unsigned int 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
+        handle_dynamic_tick(action);
 
         if (!(action->flags & IRQF_DISABLED))
                 local_irq_enable();