1 files changed, 89 insertions, 48 deletions

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 02a334662cc0..f6dca4f4b295 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -87,7 +87,10 @@ extern int tau_interrupts(int);
 #endif /* CONFIG_PPC32 */
 
 #ifdef CONFIG_PPC64
+
+#ifndef CONFIG_SPARSE_IRQ
 EXPORT_SYMBOL(irq_desc);
+#endif
 
 int distribute_irqs = 1;
 
@@ -189,33 +192,7 @@ int show_interrupts(struct seq_file *p, void *v)
                 for_each_online_cpu(j)
                         seq_printf(p, "CPU%d       ", j);
                 seq_putc(p, '\n');
-        }
-
-        if (i < NR_IRQS) {
-                desc = get_irq_desc(i);
-                spin_lock_irqsave(&desc->lock, flags);
-                action = desc->action;
-                if (!action || !action->handler)
-                        goto skip;
-                seq_printf(p, "%3d: ", i);
-#ifdef CONFIG_SMP
-                for_each_online_cpu(j)
-                        seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
-#else
-                seq_printf(p, "%10u ", kstat_irqs(i));
-#endif /* CONFIG_SMP */
-                if (desc->chip)
-                        seq_printf(p, " %s ", desc->chip->typename);
-                else
-                        seq_puts(p, "  None      ");
-                seq_printf(p, "%s", (desc->status & IRQ_LEVEL) ? "Level " : "Edge  ");
-                seq_printf(p, "    %s", action->name);
-                for (action = action->next; action; action = action->next)
-                        seq_printf(p, ", %s", action->name);
-                seq_putc(p, '\n');
-skip:
-                spin_unlock_irqrestore(&desc->lock, flags);
-        } else if (i == NR_IRQS) {
+        } else if (i == nr_irqs) {
 #if defined(CONFIG_PPC32) && defined(CONFIG_TAU_INT)
                 if (tau_initialized){
                         seq_puts(p, "TAU: ");
@@ -225,30 +202,68 @@ skip:
                 }
 #endif /* CONFIG_PPC32 && CONFIG_TAU_INT*/
                 seq_printf(p, "BAD: %10u\n", ppc_spurious_interrupts);
+
+                return 0;
         }
+
+        desc = irq_to_desc(i);
+        if (!desc)
+                return 0;
+
+        spin_lock_irqsave(&desc->lock, flags);
+
+        action = desc->action;
+        if (!action || !action->handler)
+                goto skip;
+
+        seq_printf(p, "%3d: ", i);
+#ifdef CONFIG_SMP
+        for_each_online_cpu(j)
+                seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
+#else
+        seq_printf(p, "%10u ", kstat_irqs(i));
+#endif /* CONFIG_SMP */
+
+        if (desc->chip)
+                seq_printf(p, " %s ", desc->chip->name);
+        else
+                seq_puts(p, "  None      ");
+
+        seq_printf(p, "%s", (desc->status & IRQ_LEVEL) ? "Level " : "Edge  ");
+        seq_printf(p, "    %s", action->name);
+
+        for (action = action->next; action; action = action->next)
+                seq_printf(p, ", %s", action->name);
+        seq_putc(p, '\n');
+
+skip:
+        spin_unlock_irqrestore(&desc->lock, flags);
+
         return 0;
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
 void fixup_irqs(cpumask_t map)
 {
+        struct irq_desc *desc;
         unsigned int irq;
         static int warned;
 
         for_each_irq(irq) {
                 cpumask_t mask;
 
-                if (irq_desc[irq].status & IRQ_PER_CPU)
+                desc = irq_to_desc(irq);
+                if (desc && desc->status & IRQ_PER_CPU)
                         continue;
 
-                cpumask_and(&mask, irq_desc[irq].affinity, &map);
+                cpumask_and(&mask, desc->affinity, &map);
                 if (any_online_cpu(mask) == NR_CPUS) {
                         printk("Breaking affinity for irq %i\n", irq);
                         mask = map;
                 }
-                if (irq_desc[irq].chip->set_affinity)
-                        irq_desc[irq].chip->set_affinity(irq, &mask);
-                else if (irq_desc[irq].action && !(warned++))
+                if (desc->chip->set_affinity)
+                        desc->chip->set_affinity(irq, &mask);
+                else if (desc->action && !(warned++))
                         printk("Cannot set affinity for irq %i\n", irq);
         }
 
@@ -275,7 +290,7 @@ static inline void handle_one_irq(unsigned int irq)
                 return;
         }
 
-        desc = irq_desc + irq;
+        desc = irq_to_desc(irq);
         saved_sp_limit = current->thread.ksp_limit;
 
         irqtp->task = curtp->task;
@@ -541,7 +556,7 @@ struct irq_host *irq_alloc_host(struct device_node *of_node,
                         smp_wmb();
 
                         /* Clear norequest flags */
-                        get_irq_desc(i)->status &= ~IRQ_NOREQUEST;
+                        irq_to_desc(i)->status &= ~IRQ_NOREQUEST;
 
                         /* Legacy flags are left to default at this point,
                          * one can then use irq_create_mapping() to
@@ -607,8 +622,16 @@ void irq_set_virq_count(unsigned int count)
 static int irq_setup_virq(struct irq_host *host, unsigned int virq,
                             irq_hw_number_t hwirq)
 {
+        struct irq_desc *desc;
+
+        desc = irq_to_desc_alloc_node(virq, 0);
+        if (!desc) {
+                pr_debug("irq: -> allocating desc failed\n");
+                goto error;
+        }
+
         /* Clear IRQ_NOREQUEST flag */
-        get_irq_desc(virq)->status &= ~IRQ_NOREQUEST;
+        desc->status &= ~IRQ_NOREQUEST;
 
         /* map it */
         smp_wmb();
@@ -617,11 +640,14 @@ static int irq_setup_virq(struct irq_host *host, unsigned int virq,
 
         if (host->ops->map(host, virq, hwirq)) {
                 pr_debug("irq: -> mapping failed, freeing\n");
-                irq_free_virt(virq, 1);
-                return -1;
+                goto error;
         }
 
         return 0;
+
+error:
+        irq_free_virt(virq, 1);
+        return -1;
 }
 
 unsigned int irq_create_direct_mapping(struct irq_host *host)
@@ -705,7 +731,7 @@ unsigned int irq_create_mapping(struct irq_host *host,
 EXPORT_SYMBOL_GPL(irq_create_mapping);
 
 unsigned int irq_create_of_mapping(struct device_node *controller,
-                                   u32 *intspec, unsigned int intsize)
+                                   const u32 *intspec, unsigned int intsize)
 {
         struct irq_host *host;
         irq_hw_number_t hwirq;
@@ -738,7 +764,7 @@ unsigned int irq_create_of_mapping(struct device_node *controller,
 
         /* Set type if specified and different than the current one */
         if (type != IRQ_TYPE_NONE &&
-            type != (get_irq_desc(virq)->status & IRQF_TRIGGER_MASK))
+            type != (irq_to_desc(virq)->status & IRQF_TRIGGER_MASK))
                 set_irq_type(virq, type);
         return virq;
 }
@@ -810,7 +836,7 @@ void irq_dispose_mapping(unsigned int virq)
         irq_map[virq].hwirq = host->inval_irq;
 
         /* Set some flags */
-        get_irq_desc(virq)->status |= IRQ_NOREQUEST;
+        irq_to_desc(virq)->status |= IRQ_NOREQUEST;
 
         /* Free it */
         irq_free_virt(virq, 1);
@@ -1002,12 +1028,24 @@ void irq_free_virt(unsigned int virq, unsigned int count)
         spin_unlock_irqrestore(&irq_big_lock, flags);
 }
 
-void irq_early_init(void)
+int arch_early_irq_init(void)
 {
-        unsigned int i;
+        struct irq_desc *desc;
+        int i;
+
+        for (i = 0; i < NR_IRQS; i++) {
+                desc = irq_to_desc(i);
+                if (desc)
+                        desc->status |= IRQ_NOREQUEST;
+        }
 
-        for (i = 0; i < NR_IRQS; i++)
-                get_irq_desc(i)->status |= IRQ_NOREQUEST;
+        return 0;
+}
+
+int arch_init_chip_data(struct irq_desc *desc, int node)
+{
+        desc->status |= IRQ_NOREQUEST;
+        return 0;
 }
 
 /* We need to create the radix trees late */
@@ -1069,16 +1107,19 @@ static int virq_debug_show(struct seq_file *m, void *private)
         seq_printf(m, "%-5s  %-7s  %-15s  %s\n", "virq", "hwirq",
                       "chip name", "host name");
 
-        for (i = 1; i < NR_IRQS; i++) {
-                desc = get_irq_desc(i);
+        for (i = 1; i < nr_irqs; i++) {
+                desc = irq_to_desc(i);
+                if (!desc)
+                        continue;
+
                 spin_lock_irqsave(&desc->lock, flags);
 
                 if (desc->action && desc->action->handler) {
                         seq_printf(m, "%5d  ", i);
                         seq_printf(m, "0x%05lx  ", virq_to_hw(i));
 
-                        if (desc->chip && desc->chip->typename)
-                                p = desc->chip->typename;
+                        if (desc->chip && desc->chip->name)
+                                p = desc->chip->name;
                         else
                                 p = none;
                         seq_printf(m, "%-15s  ", p);