Merge branch 'cpus4096' into irq/threaded

[safe/jmp/linux-2.6] / include / linux / irq.h

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 56f9988..873e4ac 100644 (file)
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -160,12 +160,10 @@ struct irq_2_iommu;
  */
 struct irq_desc {
        unsigned int            irq;
-#ifdef CONFIG_SPARSE_IRQ
        struct timer_rand_state *timer_rand_state;
        unsigned int            *kstat_irqs;
-# ifdef CONFIG_INTR_REMAP
+#ifdef CONFIG_INTR_REMAP
        struct irq_2_iommu      *irq_2_iommu;
-# endif
 #endif
        irq_flow_handler_t      handle_irq;
        struct irq_chip         *chip;
@@ -182,11 +180,11 @@ struct irq_desc {
        unsigned int            irqs_unhandled;
        spinlock_t              lock;
 #ifdef CONFIG_SMP
-       cpumask_t               affinity;
+       cpumask_var_t           affinity;
        unsigned int            cpu;
-#endif
 #ifdef CONFIG_GENERIC_PENDING_IRQ
-       cpumask_t               pending_mask;
+       cpumask_var_t           pending_mask;
+#endif
 #endif
 #ifdef CONFIG_PROC_FS
        struct proc_dir_entry   *dir;
@@ -202,12 +200,6 @@ extern void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc
 extern struct irq_desc irq_desc[NR_IRQS];
 #else /* CONFIG_SPARSE_IRQ */
 extern struct irq_desc *move_irq_desc(struct irq_desc *old_desc, int cpu);
-
-#define kstat_irqs_this_cpu(DESC) \
-       ((DESC)->kstat_irqs[smp_processor_id()])
-#define kstat_incr_irqs_this_cpu(irqno, DESC) \
-       ((DESC)->kstat_irqs[smp_processor_id()]++)
-
 #endif /* CONFIG_SPARSE_IRQ */
 
 extern struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu);
@@ -226,7 +218,6 @@ irq_remap_to_desc(unsigned int irq, struct irq_desc *desc)
  * Migration helpers for obsolete names, they will go away:
  */
 #define hw_interrupt_type      irq_chip
-typedef struct irq_chip                hw_irq_controller;
 #define no_irq_type            no_irq_chip
 typedef struct irq_desc                irq_desc_t;
 
@@ -236,7 +227,7 @@ typedef struct irq_desc             irq_desc_t;
 #include <asm/hw_irq.h>
 
 extern int setup_irq(unsigned int irq, struct irqaction *new);
-extern struct irqaction *remove_irq(unsigned int irq, void *dev_id);
+extern void remove_irq(unsigned int irq, struct irqaction *act);
 
 #ifdef CONFIG_GENERIC_HARDIRQS
 
@@ -281,7 +272,7 @@ static inline int irq_balancing_disabled(unsigned int irq)
 }
 
 /* Handle irq action chains: */
-extern int handle_IRQ_event(unsigned int irq, struct irqaction *action);
+extern irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action);
 
 /*
  * Built-in IRQ handlers for various IRQ types,
@@ -326,7 +317,7 @@ static inline void generic_handle_irq(unsigned int irq)
 
 /* Handling of unhandled and spurious interrupts: */
 extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
-                          int action_ret);
+                          irqreturn_t action_ret);
 
 /* Resending of interrupts :*/
 void check_irq_resend(struct irq_desc *desc, unsigned int irq);
@@ -423,4 +414,84 @@ extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
 
 #endif /* !CONFIG_S390 */
 
+#ifdef CONFIG_SMP
+/**
+ * init_alloc_desc_masks - allocate cpumasks for irq_desc
+ * @desc:      pointer to irq_desc struct
+ * @cpu:       cpu which will be handling the cpumasks
+ * @boot:      true if need bootmem
+ *
+ * Allocates affinity and pending_mask cpumask if required.
+ * Returns true if successful (or not required).
+ * Side effect: affinity has all bits set, pending_mask has all bits clear.
+ */
+static inline bool init_alloc_desc_masks(struct irq_desc *desc, int cpu,
+                                                               bool boot)
+{
+       int node;
+
+       if (boot) {
+               alloc_bootmem_cpumask_var(&desc->affinity);
+               cpumask_setall(desc->affinity);
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+               alloc_bootmem_cpumask_var(&desc->pending_mask);
+               cpumask_clear(desc->pending_mask);
+#endif
+               return true;
+       }
+
+       node = cpu_to_node(cpu);
+
+       if (!alloc_cpumask_var_node(&desc->affinity, GFP_ATOMIC, node))
+               return false;
+       cpumask_setall(desc->affinity);
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+       if (!alloc_cpumask_var_node(&desc->pending_mask, GFP_ATOMIC, node)) {
+               free_cpumask_var(desc->affinity);
+               return false;
+       }
+       cpumask_clear(desc->pending_mask);
+#endif
+       return true;
+}
+
+/**
+ * init_copy_desc_masks - copy cpumasks for irq_desc
+ * @old_desc:  pointer to old irq_desc struct
+ * @new_desc:  pointer to new irq_desc struct
+ *
+ * Insures affinity and pending_masks are copied to new irq_desc.
+ * If !CONFIG_CPUMASKS_OFFSTACK the cpumasks are embedded in the
+ * irq_desc struct so the copy is redundant.
+ */
+
+static inline void init_copy_desc_masks(struct irq_desc *old_desc,
+                                       struct irq_desc *new_desc)
+{
+#ifdef CONFIG_CPUMASKS_OFFSTACK
+       cpumask_copy(new_desc->affinity, old_desc->affinity);
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+       cpumask_copy(new_desc->pending_mask, old_desc->pending_mask);
+#endif
+#endif
+}
+
+#else /* !CONFIG_SMP */
+
+static inline bool init_alloc_desc_masks(struct irq_desc *desc, int cpu,
+                                                               bool boot)
+{
+       return true;
+}
+
+static inline void init_copy_desc_masks(struct irq_desc *old_desc,
+                                       struct irq_desc *new_desc)
+{
+}
+
+#endif /* CONFIG_SMP */
+
 #endif /* _LINUX_IRQ_H */