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authorThomas Gleixner <tglx@linutronix.de>2010-10-01 16:03:45 +0200
committerThomas Gleixner <tglx@linutronix.de>2010-10-12 16:39:04 +0200
commite144710b302525de5b90b9c3ba43562458d8957f (patch)
tree0a6ef61ccb4957512ebf4a1887ba3bc54e78f99e /kernel
parentfe21221386e46b8e0f2cbd83559a29680c28473b (diff)
downloadop-kernel-dev-e144710b302525de5b90b9c3ba43562458d8957f.zip
op-kernel-dev-e144710b302525de5b90b9c3ba43562458d8957f.tar.gz
genirq: Distangle irq.h
Move irq_desc and internal functions out of irq.h Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/irq/internals.h100
1 files changed, 100 insertions, 0 deletions
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index b905f0a..e281e45 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -1,6 +1,7 @@
/*
* IRQ subsystem internal functions and variables:
*/
+#include <linux/irqdesc.h>
extern int noirqdebug;
@@ -22,6 +23,9 @@ extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
extern void clear_kstat_irqs(struct irq_desc *desc);
extern raw_spinlock_t sparse_irq_lock;
+/* Resending of interrupts :*/
+void check_irq_resend(struct irq_desc *desc, unsigned int irq);
+
#ifdef CONFIG_SPARSE_IRQ
void replace_irq_desc(unsigned int irq, struct irq_desc *desc);
#endif
@@ -105,3 +109,99 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
#undef P
+/* Stuff below will be cleaned up after the sparse allocator is done */
+
+#ifdef CONFIG_SMP
+/**
+ * alloc_desc_masks - allocate cpumasks for irq_desc
+ * @desc: pointer to irq_desc struct
+ * @node: node 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).
+ */
+static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
+ bool boot)
+{
+ gfp_t gfp = GFP_ATOMIC;
+
+ if (boot)
+ gfp = GFP_NOWAIT;
+
+#ifdef CONFIG_CPUMASK_OFFSTACK
+ if (!alloc_cpumask_var_node(&desc->irq_data.affinity, gfp, node))
+ return false;
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ if (!alloc_cpumask_var_node(&desc->pending_mask, gfp, node)) {
+ free_cpumask_var(desc->irq_data.affinity);
+ return false;
+ }
+#endif
+#endif
+ return true;
+}
+
+static inline void init_desc_masks(struct irq_desc *desc)
+{
+ cpumask_setall(desc->irq_data.affinity);
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ cpumask_clear(desc->pending_mask);
+#endif
+}
+
+/**
+ * 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_CPUMASK_OFFSTACK
+ cpumask_copy(new_desc->irq_data.affinity, old_desc->irq_data.affinity);
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ cpumask_copy(new_desc->pending_mask, old_desc->pending_mask);
+#endif
+#endif
+}
+
+static inline void free_desc_masks(struct irq_desc *old_desc,
+ struct irq_desc *new_desc)
+{
+ free_cpumask_var(old_desc->irq_data.affinity);
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ free_cpumask_var(old_desc->pending_mask);
+#endif
+}
+
+#else /* !CONFIG_SMP */
+
+static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
+ bool boot)
+{
+ return true;
+}
+
+static inline void init_desc_masks(struct irq_desc *desc)
+{
+}
+
+static inline void init_copy_desc_masks(struct irq_desc *old_desc,
+ struct irq_desc *new_desc)
+{
+}
+
+static inline void free_desc_masks(struct irq_desc *old_desc,
+ struct irq_desc *new_desc)
+{
+}
+#endif /* CONFIG_SMP */
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