generic: add irq_desc in function in parameter

[linux-2.6-omap-h63xx.git] / include / linux / irq.h

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 8ccb462ea42c4cb3c4813c51ad285fb168efc2f9..7b59e193a1196c05021d3effc5762d3d247ca281 100644 (file)
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -62,6 +62,7 @@ typedef       void (*irq_flow_handler_t)(unsigned int irq,
 #define IRQ_MOVE_PENDING       0x00200000      /* need to re-target IRQ destination */
 #define IRQ_NO_BALANCING       0x00400000      /* IRQ is excluded from balancing */
 #define IRQ_SPURIOUS_DISABLED  0x00800000      /* IRQ was disabled by the spurious trap */
+#define IRQ_MOVE_PCNTXT        0x01000000      /* IRQ migration from process context */
 
 #ifdef CONFIG_IRQ_PER_CPU
 # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
@@ -126,6 +127,7 @@ struct irq_chip {
        const char      *typename;
 };
 
+struct timer_rand_state;
 /**
  * struct irq_desc - interrupt descriptor
  *
@@ -151,6 +153,16 @@ struct irq_chip {
  * @name:              flow handler name for /proc/interrupts output
  */
 struct irq_desc {
+       unsigned int            irq;
+#ifdef CONFIG_HAVE_SPARSE_IRQ
+       struct irq_desc         *next;
+       struct timer_rand_state *timer_rand_state;
+#endif
+#ifdef CONFIG_HAVE_DYN_ARRAY
+       unsigned int            *kstat_irqs;
+#else
+       unsigned int            kstat_irqs[NR_CPUS];
+#endif
        irq_flow_handler_t      handle_irq;
        struct irq_chip         *chip;
        struct msi_desc         *msi_desc;
@@ -178,7 +190,33 @@ struct irq_desc {
        const char              *name;
 } ____cacheline_internodealigned_in_smp;
 
+extern struct irq_desc *irq_to_desc(unsigned int irq);
+extern struct irq_desc *__irq_to_desc(unsigned int irq);
+
+#ifndef CONFIG_HAVE_SPARSE_IRQ
+
+#ifndef CONFIG_HAVE_DYN_ARRAY
+/* could be removed if we get rid of all irq_desc reference */
 extern struct irq_desc irq_desc[NR_IRQS];
+#else
+extern struct irq_desc *irq_desc;
+#endif
+
+#ifdef CONFIG_GENERIC_HARDIRQS
+#define for_each_irq_desc(irq, desc)           \
+       for (irq = 0, desc = irq_desc; irq < nr_irqs; irq++, desc = &irq_desc[irq])
+#endif
+
+#else
+
+extern struct irq_desc *sparse_irqs;
+#define for_each_irq_desc(irqX, desc)          \
+       for (desc = sparse_irqs, irqX = desc->irq; desc && irqX != -1U; desc = desc->next, irqX = desc ? desc->irq : -1U)
+
+#endif
+
+#define kstat_irqs_this_cpu(DESC) \
+       ((DESC)->kstat_irqs[smp_processor_id()])
 
 /*
  * Migration helpers for obsolete names, they will go away:
@@ -197,10 +235,6 @@ 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)
@@ -248,7 +282,10 @@ 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: */
@@ -278,10 +315,8 @@ 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
@@ -292,6 +327,11 @@ 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);
@@ -324,7 +364,10 @@ __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;
 }
 
 /*
@@ -358,7 +401,7 @@ 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;
 }
 
@@ -373,10 +416,10 @@ 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 */