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>

1 files changed, 100 insertions, 0 deletions

diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index b905f0ab1bb2..e281e45fbb55 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 */