Commit-ID: aa99ec0f3f26bf2bcd0fa5176de93598427f1e5e
Gitweb: http://git.kernel.org/tip/aa99ec0f3f26bf2bcd0fa5176de93598427f1e5e
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Mon, 27 Sep 2010 20:02:56 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Tue, 12 Oct 2010 16:39:07 +0200
genirq: Use sane sparse allocator
Make irq_to_desc_alloc_node() a wrapper around the new allocator.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Ingo Molnar <mingo@xxxxxxx>
---
kernel/irq/irqdesc.c | 129 ++++++++------------------------------------------
1 files changed, 20 insertions(+), 109 deletions(-)
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 35d9052..7cbe4f9 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -51,7 +51,7 @@ static int alloc_masks(struct irq_desc *desc, gfp_t gfp, int node)
static void desc_smp_init(struct irq_desc *desc, int node)
{
- desc->node = node;
+ desc->irq_data.node = node;
cpumask_copy(desc->irq_data.affinity, irq_default_affinity);
}
@@ -84,13 +84,6 @@ static DECLARE_BITMAP(allocated_irqs, NR_IRQS);
#ifdef CONFIG_SPARSE_IRQ
-static struct irq_desc irq_desc_init = {
- .status = IRQ_DEFAULT_INIT_FLAGS,
- .handle_irq = handle_bad_irq,
- .depth = 1,
- .lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
-};
-
void __ref init_kstat_irqs(struct irq_desc *desc, int node, int nr)
{
void *ptr;
@@ -108,29 +101,6 @@ void __ref init_kstat_irqs(struct irq_desc *desc, int node, int nr)
}
}
-static void init_one_irq_desc(int irq, struct irq_desc *desc, int node)
-{
- memcpy(desc, &irq_desc_init, sizeof(struct irq_desc));
-
- raw_spin_lock_init(&desc->lock);
- desc->irq_data.irq = irq;
-#ifdef CONFIG_SMP
- desc->irq_data.node = node;
-#endif
- lockdep_set_class(&desc->lock, &irq_desc_lock_class);
- init_kstat_irqs(desc, node, nr_cpu_ids);
- if (!desc->kstat_irqs) {
- printk(KERN_ERR "can not alloc kstat_irqs\n");
- BUG_ON(1);
- }
- if (!alloc_desc_masks(desc, node, false)) {
- printk(KERN_ERR "can not alloc irq_desc cpumasks\n");
- BUG_ON(1);
- }
- init_desc_masks(desc);
- arch_init_chip_data(desc, node);
-}
-
static RADIX_TREE(irq_desc_tree, GFP_ATOMIC);
static void irq_insert_desc(unsigned int irq, struct irq_desc *desc)
@@ -171,8 +141,9 @@ static inline void free_masks(struct irq_desc *desc) { }
static struct irq_desc *alloc_desc(int irq, int node)
{
+ /* Temporary hack until we can switch to GFP_KERNEL */
+ gfp_t gfp = gfp_allowed_mask == GFP_BOOT_MASK ? GFP_NOWAIT : GFP_ATOMIC;
struct irq_desc *desc;
- gfp_t gfp = GFP_KERNEL;
desc = kzalloc_node(sizeof(*desc), gfp, node);
if (!desc)
@@ -226,6 +197,8 @@ static int alloc_descs(unsigned int start, unsigned int cnt, int node)
desc = alloc_desc(start + i, node);
if (!desc)
goto err;
+ /* temporary until I fixed x86 madness */
+ arch_init_chip_data(desc, node);
raw_spin_lock_irqsave(&sparse_irq_lock, flags);
irq_insert_desc(start + i, desc);
raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
@@ -242,23 +215,19 @@ err:
return -ENOMEM;
}
-static struct irq_desc irq_desc_legacy[NR_IRQS_LEGACY] __cacheline_aligned_in_smp = {
- [0 ... NR_IRQS_LEGACY-1] = {
- .status = IRQ_DEFAULT_INIT_FLAGS,
- .handle_irq = handle_bad_irq,
- .depth = 1,
- .lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
- }
-};
+struct irq_desc * __ref irq_to_desc_alloc_node(unsigned int irq, int node)
+{
+ int res = irq_alloc_descs(irq, irq, 1, node);
-static unsigned int *kstat_irqs_legacy;
+ if (res == -EEXIST || res == irq)
+ return irq_to_desc(irq);
+ return NULL;
+}
int __init early_irq_init(void)
{
+ int i, node = first_online_node;
struct irq_desc *desc;
- int legacy_count;
- int node;
- int i;
init_irq_default_affinity();
@@ -266,71 +235,14 @@ int __init early_irq_init(void)
arch_probe_nr_irqs();
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);
- node = first_online_node;
-
- /* allocate based on nr_cpu_ids */
- kstat_irqs_legacy = kzalloc_node(NR_IRQS_LEGACY * nr_cpu_ids *
- sizeof(int), GFP_NOWAIT, node);
-
- irq_desc_init.irq_data.chip = &no_irq_chip;
-
- for (i = 0; i < legacy_count; i++) {
- desc[i].irq_data.irq = i;
- desc[i].irq_data.chip = &no_irq_chip;
-#ifdef CONFIG_SMP
- desc[i].irq_data.node = node;
-#endif
- desc[i].kstat_irqs = kstat_irqs_legacy + i * nr_cpu_ids;
- lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
- alloc_desc_masks(&desc[i], node, true);
- init_desc_masks(&desc[i]);
- irq_insert_desc(i, &desc[i]);
+ for (i = 0; i < NR_IRQS_LEGACY; i++) {
+ desc = alloc_desc(i, node);
+ set_bit(i, allocated_irqs);
+ irq_insert_desc(i, desc);
}
-
return arch_early_irq_init();
}
-struct irq_desc * __ref irq_to_desc_alloc_node(unsigned int irq, int node)
-{
- struct irq_desc *desc;
- unsigned long flags;
-
- if (irq >= nr_irqs) {
- WARN(1, "irq (%d) >= nr_irqs (%d) in irq_to_desc_alloc\n",
- irq, nr_irqs);
- return NULL;
- }
-
- desc = irq_to_desc(irq);
- if (desc)
- return desc;
-
- raw_spin_lock_irqsave(&sparse_irq_lock, flags);
-
- /* We have to check it to avoid races with another CPU */
- desc = irq_to_desc(irq);
- if (desc)
- goto out_unlock;
-
- desc = kzalloc_node(sizeof(*desc), GFP_ATOMIC, node);
-
- printk(KERN_DEBUG " alloc irq_desc for %d on node %d\n", irq, node);
- if (!desc) {
- printk(KERN_ERR "can not alloc irq_desc\n");
- BUG_ON(1);
- }
- init_one_irq_desc(irq, desc, node);
-
- irq_insert_desc(irq, desc);
-
-out_unlock:
- raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
-
- return desc;
-}
-
#else /* !CONFIG_SPARSE_IRQ */
struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
@@ -345,9 +257,8 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
static unsigned int kstat_irqs_all[NR_IRQS][NR_CPUS];
int __init early_irq_init(void)
{
+ int count, i, node = first_online_node;
struct irq_desc *desc;
- int count;
- int i;
init_irq_default_affinity();
@@ -359,9 +270,9 @@ int __init early_irq_init(void)
for (i = 0; i < count; i++) {
desc[i].irq_data.irq = i;
desc[i].irq_data.chip = &no_irq_chip;
- alloc_desc_masks(&desc[i], 0, true);
- init_desc_masks(&desc[i]);
desc[i].kstat_irqs = kstat_irqs_all[i];
+ alloc_masks(desc + i, GFP_KERNEL, node);
+ desc_smp_init(desc + i, node);
lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
}
return arch_early_irq_init();
--
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