C++ (Cpp) init_one_irq_descの例

コード例 #1

ファイル: irq.c プロジェクト: doniexun/xen

static int init_local_irq_data(void)
{
    int irq;

    spin_lock(&local_irqs_type_lock);

    for (irq = 0; irq < NR_LOCAL_IRQS; irq++) {
        struct irq_desc *desc = irq_to_desc(irq);
        init_one_irq_desc(desc);
        desc->irq = irq;
        desc->action  = NULL;

        /* PPIs are included in local_irqs, we copy the IRQ type from
         * local_irqs_type when bringing up local IRQ for this CPU in
         * order to pick up any configuration done before this CPU came
         * up. For interrupts configured after this point this is done in
         * irq_set_type.
         */
        desc->arch.type = local_irqs_type[irq];
    }

    spin_unlock(&local_irqs_type_lock);

    return 0;
}

コード例 #2

ファイル: irq.c プロジェクト: doniexun/xen

static int __init init_irq_data(void)
{
    int irq;

    for (irq = NR_LOCAL_IRQS; irq < NR_IRQS; irq++) {
        struct irq_desc *desc = irq_to_desc(irq);
        init_one_irq_desc(desc);
        desc->irq = irq;
        desc->action  = NULL;
    }

    return 0;
}

コード例 #3

ファイル: handle.c プロジェクト: Atrix-Dev-Team/kernel-MB860

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_desc_ptrs[irq];
	if (desc)
		return desc;

	spin_lock_irqsave(&sparse_irq_lock, flags);

	/* We have to check it to avoid races with another CPU */
	desc = irq_desc_ptrs[irq];
	if (desc)
		goto out_unlock;

	if (slab_is_available())
		desc = kzalloc_node(sizeof(*desc), GFP_ATOMIC, node);
	else
		desc = alloc_bootmem_node(NODE_DATA(node), sizeof(*desc));

	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_desc_ptrs[irq] = desc;

out_unlock:
	spin_unlock_irqrestore(&sparse_irq_lock, flags);

	return desc;
}

コード例 #4

ファイル: handle.c プロジェクト: jameshilliard/WECB-BH-GPL

struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu)
{
	struct irq_desc *desc;
	unsigned long flags;
	int node;

	if (irq >= nr_irqs) {
		WARN(1, "irq (%d) >= nr_irqs (%d) in irq_to_desc_alloc\n",
			irq, nr_irqs);
		return NULL;
	}

	desc = irq_desc_ptrs[irq];
	if (desc)
		return desc;

	spin_lock_irqsave(&sparse_irq_lock, flags);

	/* We have to check it to avoid races with another CPU */
	desc = irq_desc_ptrs[irq];
	if (desc)
		goto out_unlock;

	node = cpu_to_node(cpu);
	desc = kzalloc_node(sizeof(*desc), GFP_ATOMIC, node);
	printk(KERN_DEBUG "  alloc irq_desc for %d on cpu %d node %d\n",
		 irq, cpu, node);
	if (!desc) {
		printk(KERN_ERR "can not alloc irq_desc\n");
		BUG_ON(1);
	}
	init_one_irq_desc(irq, desc, cpu);

	irq_desc_ptrs[irq] = desc;

out_unlock:
	spin_unlock_irqrestore(&sparse_irq_lock, flags);

	return desc;
}

コード例 #5

ファイル: handle.c プロジェクト: chrmorais/miniemc2

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);

	set_irq_desc(irq, desc);

out_unlock:
	raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);

	return desc;
}