irq: allocate irq_desc_ptrs array based on nr_irqs

[linux-2.6-omap-h63xx.git] / kernel / irq / handle.c

diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index c20db0be9173969a52c7ab75341cc8171db63d46..d0b8f7e72790e357a5219bd4549fdb6132f2c5e2 100644 (file)
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -17,6 +17,7 @@
 #include <linux/kernel_stat.h>
 #include <linux/rculist.h>
 #include <linux/hash.h>
+#include <linux/bootmem.h>
 
 #include "internals.h"
 
@@ -64,9 +65,6 @@ static struct irq_desc irq_desc_init = {
        .handle_irq = handle_bad_irq,
        .depth      = 1,
        .lock       = __SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
-#ifdef CONFIG_SMP
-       .affinity   = CPU_MASK_ALL
-#endif
 };
 
 void init_kstat_irqs(struct irq_desc *desc, int cpu, int nr)
@@ -101,6 +99,10 @@ static void init_one_irq_desc(int irq, struct irq_desc *desc, int cpu)
                printk(KERN_ERR "can not alloc kstat_irqs\n");
                BUG_ON(1);
        }
+       if (!init_alloc_desc_masks(desc, cpu, false)) {
+               printk(KERN_ERR "can not alloc irq_desc cpumasks\n");
+               BUG_ON(1);
+       }
        arch_init_chip_data(desc, cpu);
 }
 
@@ -109,7 +111,7 @@ static void init_one_irq_desc(int irq, struct irq_desc *desc, int cpu)
  */
 DEFINE_SPINLOCK(sparse_irq_lock);
 
-struct irq_desc *irq_desc_ptrs[NR_IRQS] __read_mostly;
+struct irq_desc **irq_desc_ptrs __read_mostly;
 
 static struct irq_desc irq_desc_legacy[NR_IRQS_LEGACY] __cacheline_aligned_in_smp = {
        [0 ... NR_IRQS_LEGACY-1] = {
@@ -119,9 +121,6 @@ static struct irq_desc irq_desc_legacy[NR_IRQS_LEGACY] __cacheline_aligned_in_sm
                .handle_irq = handle_bad_irq,
                .depth      = 1,
                .lock       = __SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
-#ifdef CONFIG_SMP
-               .affinity   = CPU_MASK_ALL
-#endif
        }
 };
 
@@ -134,18 +133,23 @@ int __init early_irq_init(void)
        int legacy_count;
        int i;
 
+       printk(KERN_INFO "NR_IRQS:%d nr_irqs:%d\n", NR_IRQS, nr_irqs);
+
        desc = irq_desc_legacy;
        legacy_count = ARRAY_SIZE(irq_desc_legacy);
 
+       /* allocate irq_desc_ptrs array based on nr_irqs */
+       irq_desc_ptrs = alloc_bootmem(nr_irqs * sizeof(void *));
+
        for (i = 0; i < legacy_count; i++) {
                desc[i].irq = i;
                desc[i].kstat_irqs = kstat_irqs_legacy[i];
                lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
-
+               init_alloc_desc_masks(&desc[i], 0, true);
                irq_desc_ptrs[i] = desc + i;
        }
 
-       for (i = legacy_count; i < NR_IRQS; i++)
+       for (i = legacy_count; i < nr_irqs; i++)
                irq_desc_ptrs[i] = NULL;
 
        return arch_early_irq_init();
@@ -153,7 +157,10 @@ int __init early_irq_init(void)
 
 struct irq_desc *irq_to_desc(unsigned int irq)
 {
-       return (irq < NR_IRQS) ? irq_desc_ptrs[irq] : NULL;
+       if (irq_desc_ptrs && irq < nr_irqs)
+               return irq_desc_ptrs[irq];
+
+       return NULL;
 }
 
 struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu)
@@ -162,10 +169,9 @@ struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu)
        unsigned long flags;
        int node;
 
-       if (irq >= NR_IRQS) {
-               printk(KERN_WARNING "irq >= NR_IRQS in irq_to_desc_alloc: %d %d\n",
-                               irq, NR_IRQS);
-               WARN_ON(1);
+       if (irq >= nr_irqs) {
+               WARN(1, "irq (%d) >= nr_irqs (%d) in irq_to_desc_alloc\n",
+                       irq, nr_irqs);
                return NULL;
        }
 
@@ -207,9 +213,6 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
                .handle_irq = handle_bad_irq,
                .depth = 1,
                .lock = __SPIN_LOCK_UNLOCKED(irq_desc->lock),
-#ifdef CONFIG_SMP
-               .affinity = CPU_MASK_ALL
-#endif
        }
 };
 
@@ -219,12 +222,15 @@ int __init early_irq_init(void)
        int count;
        int i;
 
+       printk(KERN_INFO "NR_IRQS:%d\n", NR_IRQS);
+
        desc = irq_desc;
        count = ARRAY_SIZE(irq_desc);
 
-       for (i = 0; i < count; i++)
+       for (i = 0; i < count; i++) {
                desc[i].irq = i;
-
+               init_alloc_desc_masks(&desc[i], 0, true);
+       }
        return arch_early_irq_init();
 }