cpumask: update irq_desc to use cpumask_var_t

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

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 98564dc6447627f0d6c25033e3ba601db819daf1..fa27210f1dfd902c3d16a920f40869196c897dda 100644 (file)
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -113,7 +113,8 @@ struct irq_chip {
        void            (*eoi)(unsigned int irq);
 
        void            (*end)(unsigned int irq);
-       void            (*set_affinity)(unsigned int irq, cpumask_t dest);
+       void            (*set_affinity)(unsigned int irq,
+                                       const struct cpumask *dest);
        int             (*retrigger)(unsigned int irq);
        int             (*set_type)(unsigned int irq, unsigned int flow_type);
        int             (*set_wake)(unsigned int irq, unsigned int on);
@@ -181,11 +182,11 @@ 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;
@@ -193,42 +194,23 @@ struct irq_desc {
        const char              *name;
 } ____cacheline_internodealigned_in_smp;
 
-extern void early_irq_init(void);
-extern void arch_early_irq_init(void);
-extern void arch_init_chip_data(struct irq_desc *desc, int cpu);
 extern void arch_init_copy_chip_data(struct irq_desc *old_desc,
                                        struct irq_desc *desc, int cpu);
 extern void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc);
 
 #ifndef CONFIG_SPARSE_IRQ
 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;
-}
-static inline struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu)
-{
-       return irq_to_desc(irq);
-}
-
-#else
-
-extern struct irq_desc *irq_to_desc(unsigned int irq);
-extern struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu);
+#else /* CONFIG_SPARSE_IRQ */
 extern struct irq_desc *move_irq_desc(struct irq_desc *old_desc, int cpu);
 
-# define for_each_irq_desc(irq, desc)          \
-       for (irq = 0, desc = irq_to_desc(irq); irq < nr_irqs; irq++, desc = irq_to_desc(irq))
-# define for_each_irq_desc_reverse(irq, desc)                          \
-       for (irq = nr_irqs - 1, desc = irq_to_desc(irq); irq >= 0; irq--, desc = irq_to_desc(irq))
-
 #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
+#endif /* CONFIG_SPARSE_IRQ */
+
+extern struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu);
 
 static inline struct irq_desc *
 irq_remap_to_desc(unsigned int irq, struct irq_desc *desc)
@@ -440,4 +422,79 @@ 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
+ * @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 node,
+                                                               bool boot)
+{
+       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;
+       }
+
+       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 node,
+                                                               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 */