1 files changed, 31 insertions, 25 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 8d9411bc60f6..d058c57be02d 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -18,6 +18,7 @@
 #include <linux/spinlock.h>
 #include <linux/cpumask.h>
 #include <linux/irqreturn.h>
+#include <linux/irqnr.h>
 #include <linux/errno.h>
 
 #include <asm/irq.h>
@@ -152,6 +153,7 @@ struct irq_chip {
  * @name:               flow handler name for /proc/interrupts output
  */
 struct irq_desc {
+        unsigned int            irq;
         irq_flow_handler_t      handle_irq;
         struct irq_chip         *chip;
         struct msi_desc         *msi_desc;
@@ -170,7 +172,7 @@ struct irq_desc {
         cpumask_t               affinity;
         unsigned int            cpu;
 #endif
-#if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
+#ifdef CONFIG_GENERIC_PENDING_IRQ
         cpumask_t               pending_mask;
 #endif
 #ifdef CONFIG_PROC_FS
@@ -179,8 +181,14 @@ struct irq_desc {
         const char              *name;
 } ____cacheline_internodealigned_in_smp;
 
+
 extern struct irq_desc irq_desc[NR_IRQS];
 
+static inline struct irq_desc *irq_to_desc(unsigned int irq)
+{
+        return (irq < nr_irqs) ? irq_desc + irq : NULL;
+}
+
 /*
  * Migration helpers for obsolete names, they will go away:
  */
@@ -198,19 +206,15 @@ 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
 
-#if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
+#ifdef CONFIG_GENERIC_PENDING_IRQ
 
 void set_pending_irq(unsigned int irq, cpumask_t mask);
 void move_native_irq(int irq);
 void move_masked_irq(int irq);
 
-#else /* CONFIG_GENERIC_PENDING_IRQ || CONFIG_IRQBALANCE */
+#else /* CONFIG_GENERIC_PENDING_IRQ */
 
 static inline void move_irq(int irq)
 {
@@ -237,19 +241,14 @@ static inline void set_pending_irq(unsigned int irq, cpumask_t mask)
 
 #endif /* CONFIG_SMP */
 
-#ifdef CONFIG_IRQBALANCE
-extern void set_balance_irq_affinity(unsigned int irq, cpumask_t mask);
-#else
-static inline void set_balance_irq_affinity(unsigned int irq, cpumask_t mask)
-{
-}
-#endif
-
 extern int no_irq_affinity;
 
 static inline int irq_balancing_disabled(unsigned int irq)
 {
-        return irq_desc[irq].status & IRQ_NO_BALANCING_MASK;
+        struct irq_desc *desc;
+
+        desc = irq_to_desc(irq);
+        return desc->status & IRQ_NO_BALANCING_MASK;
 }
 
 /* Handle irq action chains: */
@@ -279,10 +278,8 @@ extern unsigned int __do_IRQ(unsigned int irq);
  * irqchip-style controller then we call the ->handle_irq() handler,
  * and it calls __do_IRQ() if it's attached to an irqtype-style controller.
  */
-static inline void generic_handle_irq(unsigned int irq)
+static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc)
 {
-        struct irq_desc *desc = irq_desc + irq;
-
 #ifdef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
         desc->handle_irq(irq, desc);
 #else
@@ -293,6 +290,11 @@ static inline void generic_handle_irq(unsigned int irq)
 #endif
 }
 
+static inline void generic_handle_irq(unsigned int irq)
+{
+        generic_handle_irq_desc(irq, irq_to_desc(irq));
+}
+
 /* Handling of unhandled and spurious interrupts: */
 extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
                            int action_ret);
@@ -325,7 +327,10 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
 static inline void __set_irq_handler_unlocked(int irq,
                                               irq_flow_handler_t handler)
 {
-        irq_desc[irq].handle_irq = handler;
+        struct irq_desc *desc;
+
+        desc = irq_to_desc(irq);
+        desc->handle_irq = handler;
 }
 
 /*
@@ -353,13 +358,14 @@ extern void set_irq_noprobe(unsigned int irq);
 extern void set_irq_probe(unsigned int irq);
 
 /* Handle dynamic irq creation and destruction */
+extern unsigned int create_irq_nr(unsigned int irq_want);
 extern int create_irq(void);
 extern void destroy_irq(unsigned int irq);
 
 /* Test to see if a driver has successfully requested an irq */
 static inline int irq_has_action(unsigned int irq)
 {
-        struct irq_desc *desc = irq_desc + irq;
+        struct irq_desc *desc = irq_to_desc(irq);
         return desc->action != NULL;
 }
 
@@ -374,10 +380,10 @@ extern int set_irq_chip_data(unsigned int irq, void *data);
 extern int set_irq_type(unsigned int irq, unsigned int type);
 extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
 
-#define get_irq_chip(irq)       (irq_desc[irq].chip)
-#define get_irq_chip_data(irq)  (irq_desc[irq].chip_data)
-#define get_irq_data(irq)       (irq_desc[irq].handler_data)
-#define get_irq_msi(irq)        (irq_desc[irq].msi_desc)
+#define get_irq_chip(irq)       (irq_to_desc(irq)->chip)
+#define get_irq_chip_data(irq)  (irq_to_desc(irq)->chip_data)
+#define get_irq_data(irq)       (irq_to_desc(irq)->handler_data)
+#define get_irq_msi(irq)        (irq_to_desc(irq)->msi_desc)
 
 #endif /* CONFIG_GENERIC_HARDIRQS */