genirq: Remove the now unused sparse irq leftovers

The move_irq_desc() function was only used due to the problem that the
allocator did not free the old descriptors. So the descriptors had to
be moved in create_irq_nr(). That's history.

The code would have never been able to move active interrupt
descriptors on affinity settings. That can be done in a completely
different way w/o all this horror.

Remove all of it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 28 deletions

diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index c9d5a1c12874..4f0b9c9d5c46 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -20,7 +20,7 @@
 /*
  * lockdep: we want to handle all irq_desc locks as a single lock-class:
  */
-struct lock_class_key irq_desc_lock_class;
+static struct lock_class_key irq_desc_lock_class;
 
 #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS)
 static void __init init_irq_default_affinity(void)
@@ -90,28 +90,11 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node)
 int nr_irqs = NR_IRQS;
 EXPORT_SYMBOL_GPL(nr_irqs);
 
-DEFINE_RAW_SPINLOCK(sparse_irq_lock);
+static DEFINE_RAW_SPINLOCK(sparse_irq_lock);
 static DECLARE_BITMAP(allocated_irqs, NR_IRQS);
 
 #ifdef CONFIG_SPARSE_IRQ
 
-void __ref init_kstat_irqs(struct irq_desc *desc, int node, int nr)
-{
-        void *ptr;
-
-        ptr = kzalloc_node(nr * sizeof(*desc->kstat_irqs),
-                           GFP_ATOMIC, node);
-
-        /*
-         * don't overwite if can not get new one
-         * init_copy_kstat_irqs() could still use old one
-         */
-        if (ptr) {
-                printk(KERN_DEBUG "  alloc kstat_irqs on node %d\n", node);
-                desc->kstat_irqs = ptr;
-        }
-}
-
 static RADIX_TREE(irq_desc_tree, GFP_ATOMIC);
 
 static void irq_insert_desc(unsigned int irq, struct irq_desc *desc)
@@ -124,15 +107,6 @@ struct irq_desc *irq_to_desc(unsigned int irq)
         return radix_tree_lookup(&irq_desc_tree, irq);
 }
 
-void replace_irq_desc(unsigned int irq, struct irq_desc *desc)
-{
-        void **ptr;
-
-        ptr = radix_tree_lookup_slot(&irq_desc_tree, irq);
-        if (ptr)
-                radix_tree_replace_slot(ptr, desc);
-}
-
 static void delete_irq_desc(unsigned int irq)
 {
         radix_tree_delete(&irq_desc_tree, irq);