genirq: remove sparse irq code

This code is not ready, but we need to rip it out instead of rebasing
as we would lose the APIC/IO_APIC unification otherwise.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

3 files changed, 1 insertions, 124 deletions

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 60c9c7ee6b2..9ce80213007 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -558,8 +558,6 @@ struct timer_rand_state {
 	unsigned dont_count_entropy:1;
 };
 
-#ifndef CONFIG_HAVE_SPARSE_IRQ
-
 #ifdef CONFIG_HAVE_DYN_ARRAY
 static struct timer_rand_state **irq_timer_state;
 DEFINE_DYN_ARRAY(irq_timer_state, sizeof(struct timer_rand_state *), nr_irqs, PAGE_SIZE, NULL);
@@ -583,33 +581,6 @@ static void set_timer_rand_state(unsigned int irq, struct timer_rand_state *stat
 	irq_timer_state[irq] = state;
 }
 
-#else
-
-static struct timer_rand_state *get_timer_rand_state(unsigned int irq)
-{
-	struct irq_desc *desc;
-
-	desc = irq_to_desc(irq);
-
-	if (!desc)
-		return NULL;
-
-	return desc->timer_rand_state;
-}
-
-static void set_timer_rand_state(unsigned int irq, struct timer_rand_state *state)
-{
-	struct irq_desc *desc;
-
-	desc = irq_to_desc(irq);
-
-	if (!desc)
-		return;
-
-	desc->timer_rand_state = state;
-}
-#endif
-
 static struct timer_rand_state input_timer_state;
 
 /*
@@ -967,10 +938,8 @@ void rand_initialize_irq(int irq)
 {
 	struct timer_rand_state *state;
 
-#ifndef CONFIG_HAVE_SPARSE_IRQ
 	if (irq >= nr_irqs)
 		return;
-#endif
 
 	state = get_timer_rand_state(irq);
 
diff --git a/drivers/pci/htirq.c b/drivers/pci/htirq.c
index 9e4929a0083..bf7d6ce9bbb 100644
--- a/drivers/pci/htirq.c
+++ b/drivers/pci/htirq.c
@@ -82,18 +82,6 @@ void unmask_ht_irq(unsigned int irq)
 	write_ht_irq_msg(irq, &msg);
 }
 
-static unsigned int build_irq_for_pci_dev(struct pci_dev *dev)
-{
-	unsigned int irq;
-
-	irq = dev->bus->number;
-	irq <<= 8;
-	irq |= dev->devfn;
-	irq <<= 12;
-
-	return irq;
-}
-
 /**
  * __ht_create_irq - create an irq and attach it to a device.
  * @dev: The hypertransport device to find the irq capability on.
@@ -110,7 +98,6 @@ int __ht_create_irq(struct pci_dev *dev, int idx, ht_irq_update_t *update)
 	int max_irq;
 	int pos;
 	int irq;
-	unsigned int irq_want;
 
 	pos = pci_find_ht_capability(dev, HT_CAPTYPE_IRQ);
 	if (!pos)
@@ -138,12 +125,8 @@ int __ht_create_irq(struct pci_dev *dev, int idx, ht_irq_update_t *update)
 	cfg->msg.address_lo = 0xffffffff;
 	cfg->msg.address_hi = 0xffffffff;
 
-	irq_want= build_irq_for_pci_dev(dev);
-#ifdef CONFIG_HAVE_SPARSE_IRQ
-	irq = create_irq_nr(irq_want + idx);
-#else
 	irq = create_irq();
-#endif
+
 	if (irq <= 0) {
 		kfree(cfg);
 		return -EBUSY;
diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c
index 2dcf973890c..0f43b265eee 100644
--- a/drivers/pci/intr_remapping.c
+++ b/drivers/pci/intr_remapping.c
@@ -19,78 +19,6 @@ struct irq_2_iommu {
 	u8  irte_mask;
 };
 
-#ifdef CONFIG_HAVE_SPARSE_IRQ
-static struct irq_2_iommu *irq_2_iommuX;
-/* fill one page ? */
-static int nr_irq_2_iommu = 0x100;
-static int irq_2_iommu_index;
-DEFINE_DYN_ARRAY(irq_2_iommuX, sizeof(struct irq_2_iommu), nr_irq_2_iommu, PAGE_SIZE, NULL);
-
-extern void *__alloc_bootmem_nopanic(unsigned long size,
-				     unsigned long align,
-				     unsigned long goal);
-
-static struct irq_2_iommu *get_one_free_irq_2_iommu(int not_used)
-{
-	struct irq_2_iommu *iommu;
-	unsigned long total_bytes;
-
-	if (irq_2_iommu_index >= nr_irq_2_iommu) {
-		/*
-		 *  we run out of pre-allocate ones, allocate more
-		 */
-		printk(KERN_DEBUG "try to get more irq_2_iommu %d\n", nr_irq_2_iommu);
-
-		total_bytes = sizeof(struct irq_2_iommu)*nr_irq_2_iommu;
-
-		if (after_bootmem)
-			iommu = kzalloc(total_bytes, GFP_ATOMIC);
-		else
-			iommu = __alloc_bootmem_nopanic(total_bytes, PAGE_SIZE, 0);
-
-		if (!iommu)
-			panic("can not get more irq_2_iommu\n");
-
-		irq_2_iommuX = iommu;
-		irq_2_iommu_index = 0;
-	}
-
-	iommu = &irq_2_iommuX[irq_2_iommu_index];
-	irq_2_iommu_index++;
-	return iommu;
-}
-
-static struct irq_2_iommu *irq_2_iommu(unsigned int irq)
-{
-	struct irq_desc *desc;
-
-	desc = irq_to_desc(irq);
-
-	BUG_ON(!desc);
-
-	return desc->irq_2_iommu;
-}
-
-static struct irq_2_iommu *irq_2_iommu_alloc(unsigned int irq)
-{
-	struct irq_desc *desc;
-	struct irq_2_iommu *irq_iommu;
-
-	/*
-	 * alloc irq desc if not allocated already.
-	 */
-	desc = irq_to_desc_alloc(irq);
-
-	irq_iommu = desc->irq_2_iommu;
-
-	if (!irq_iommu)
-		desc->irq_2_iommu = get_one_free_irq_2_iommu(irq);
-
-	return desc->irq_2_iommu;
-}
-
-#else /* !CONFIG_HAVE_SPARSE_IRQ */
-
 #ifdef CONFIG_HAVE_DYN_ARRAY
 static struct irq_2_iommu *irq_2_iommuX;
 DEFINE_DYN_ARRAY(irq_2_iommuX, sizeof(struct irq_2_iommu), nr_irqs, PAGE_SIZE, NULL);
@@ -109,7 +37,6 @@ static struct irq_2_iommu *irq_2_iommu_alloc(unsigned int irq)
 {
 	return irq_2_iommu(irq);
 }
-#endif
 
 static DEFINE_SPINLOCK(irq_2_ir_lock);
 
@@ -166,11 +93,9 @@ int alloc_irte(struct intel_iommu *iommu, int irq, u16 count)
 	if (!count)
 		return -1;
 
-#ifndef	CONFIG_HAVE_SPARSE_IRQ
 	/* protect irq_2_iommu_alloc later */
 	if (irq >= nr_irqs)
 		return -1;
-#endif
 
 	/*
 	 * start the IRTE search from index 0.