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Commit 67fb283e authored by Yinghai Lu's avatar Yinghai Lu Committed by Ingo Molnar
Browse files

irq: separate sparse_irqs from sparse_irqs_free 



so later don't need compare with -1U

Signed-off-by: default avatarYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent cb5bc832

include/linux/irq.h

+1 −1
Original line number Diff line number Diff line
@@ -211,7 +211,7 @@ extern struct irq_desc *irq_desc; 


extern struct irq_desc *sparse_irqs;

#define for_each_irq_desc(irqX, desc)		\

	for (desc = sparse_irqs, irqX = desc->irq; desc && irqX != -1U; desc = desc->next, irqX = desc ? desc->irq : -1U)

	for (desc = sparse_irqs, irqX = desc->irq; desc; desc = desc->next, irqX = desc ? desc->irq : -1U)



#endif

kernel/irq/handle.c

+61 −54
Original line number Diff line number Diff line
@@ -112,6 +112,11 @@ static void init_kstat_irqs(struct irq_desc *desc, int nr_desc, int nr) 
	}

}



#ifdef CONFIG_HAVE_SPARSE_IRQ

static struct irq_desc *sparse_irqs_free;

struct irq_desc *sparse_irqs;

#endif



static void __init init_work(void *data)

{

	struct dyn_array *da = data;
@@ -127,13 +132,16 @@ static void __init init_work(void *data) 
#endif

	}



	/* init kstat_irqs, nr_cpu_ids is ready already */

	init_kstat_irqs(desc, *da->nr, nr_cpu_ids);



#ifdef CONFIG_HAVE_SPARSE_IRQ

	for (i = 1; i < *da->nr; i++)

		desc[i-1].next = &desc[i];

#endif



	/* init kstat_irqs, nr_cpu_ids is ready already */

	init_kstat_irqs(desc, *da->nr, nr_cpu_ids);

	sparse_irqs_free = sparse_irqs;

	sparse_irqs = NULL;

#endif

}



#ifdef CONFIG_HAVE_SPARSE_IRQ
@@ -148,23 +156,17 @@ static int __init parse_nr_irq_desc(char *arg) 


early_param("nr_irq_desc", parse_nr_irq_desc);



struct irq_desc *sparse_irqs;

DEFINE_DYN_ARRAY(sparse_irqs, sizeof(struct irq_desc), nr_irq_desc, PAGE_SIZE, init_work);



struct irq_desc *irq_to_desc(unsigned int irq)

{

	struct irq_desc *desc;



	BUG_ON(irq == -1U);



	desc = &sparse_irqs[0];

	desc = sparse_irqs;

	while (desc) {

		if (desc->irq == irq)

			return desc;



		if (desc->irq == -1U)

			return NULL;



		desc = desc->next;

	}

	return NULL;
@@ -174,21 +176,12 @@ struct irq_desc *irq_to_desc_alloc(unsigned int irq) 
	struct irq_desc *desc, *desc_pri;

	int i;

	int count = 0;

	unsigned long phys;

	unsigned long total_bytes;



	BUG_ON(irq == -1U);



	desc_pri = desc = &sparse_irqs[0];

	desc_pri = desc = sparse_irqs;

	while (desc) {

		if (desc->irq == irq)

			return desc;



		if (desc->irq == -1U) {

			desc->irq = irq;

			printk(KERN_DEBUG "found new irq_desc for irq %d\n", desc->irq);

			return desc;

		}

		desc_pri = desc;

		desc = desc->next;

		count++;
@@ -197,22 +190,11 @@ struct irq_desc *irq_to_desc_alloc(unsigned int irq) 
	/*

	 *  we run out of pre-allocate ones, allocate more

	 */

	printk(KERN_DEBUG "try to get more irq_desc %d\n", nr_irq_desc);

	{

		/* double check if some one mess up the list */

		struct irq_desc *desc;

		int count = 0;

	if (!sparse_irqs_free) {

		unsigned long phys;

		unsigned long total_bytes;



		desc = &sparse_irqs[0];

		while (desc) {

			printk(KERN_DEBUG "found irq_desc for irq %d\n", desc->irq);

			if (desc->next)

				printk(KERN_DEBUG "found irq_desc for irq %d and next will be irq %d\n", desc->irq, desc->next->irq);

			desc = desc->next;

			count++;

		}

		printk(KERN_DEBUG "all preallocted %d\n", count);

	}

		printk(KERN_DEBUG "try to get more irq_desc %d\n", nr_irq_desc);



		total_bytes = sizeof(struct irq_desc) * nr_irq_desc;

		if (after_bootmem)
@@ -235,10 +217,35 @@ struct irq_desc *irq_to_desc_alloc(unsigned int irq) 
		/* init kstat_irqs, nr_cpu_ids is ready already */

		init_kstat_irqs(desc, nr_irq_desc, nr_cpu_ids);



	desc->irq = irq;

		sparse_irqs_free = desc;

	}



	desc = sparse_irqs_free;

	sparse_irqs_free = sparse_irqs_free->next;

	desc->next = NULL;

	if (desc_pri)

		desc_pri->next = desc;

	printk(KERN_DEBUG "1 found new irq_desc for irq %d and pri will be irq %d\n", desc->irq, desc_pri->irq);

	else

		sparse_irqs = desc;

	desc->irq = irq;

	printk(KERN_DEBUG "found new irq_desc for irq %d\n", desc->irq);

#ifdef CONFIG_HAVE_SPARSE_IRQ_DEBUG

	{

		/* dump the results */

		struct irq_desc *desc;

		unsigned long phys;

		unsigned long bytes = sizeof(struct irq_desc);

		unsigned int irqx;



		printk(KERN_DEBUG "=========================== %d\n", irq);

		printk(KERN_DEBUG "irq_desc dump after get that for %d\n", irq);

		for_each_irq_desc(irqx, desc) {

			phys = __pa(desc);

			printk(KERN_DEBUG "irq_desc %d ==> [%#lx - %#lx]\n", irqx, phys, phys + bytes);

		}

		printk(KERN_DEBUG "===========================\n");

	}

#endif

	return desc;

}

#else