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Commit ad9f4334 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

x86: Use sane enumeration 



Instead of looping through all interrupts, use the bitmap lookup to
find the next.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarIngo Molnar <mingo@elte.hu>
parent 48b26501

arch/x86/kernel/apic/io_apic.c

+10 −12
Original line number Original line Diff line number Diff line
@@ -1160,7 +1160,6 @@ void __setup_vector_irq(int cpu) 
	/* Initialize vector_irq on a new cpu */

	/* Initialize vector_irq on a new cpu */

	int irq, vector;

	int irq, vector;

	struct irq_cfg *cfg;

	struct irq_cfg *cfg;

	struct irq_desc *desc;





	/*

	/*

	 * vector_lock will make sure that we don't run into irq vector

	 * vector_lock will make sure that we don't run into irq vector
@@ -1169,9 +1168,10 @@ void __setup_vector_irq(int cpu) 
	 */

	 */

	raw_spin_lock(&vector_lock);

	raw_spin_lock(&vector_lock);

	/* Mark the inuse vectors */

	/* Mark the inuse vectors */

	for_each_irq_desc(irq, desc) {

	for_each_active_irq(irq) {

		cfg = get_irq_desc_chip_data(desc);

		cfg = get_irq_chip_data(irq);



		if (!cfg)

			continue;

		/*

		/*

		 * If it is a legacy IRQ handled by the legacy PIC, this cpu

		 * If it is a legacy IRQ handled by the legacy PIC, this cpu

		 * will be part of the irq_cfg's domain.

		 * will be part of the irq_cfg's domain.
@@ -1516,7 +1516,6 @@ __apicdebuginit(void) print_IO_APIC(void) 
	union IO_APIC_reg_03 reg_03;

	union IO_APIC_reg_03 reg_03;

	unsigned long flags;

	unsigned long flags;

	struct irq_cfg *cfg;

	struct irq_cfg *cfg;

	struct irq_desc *desc;

	unsigned int irq;

	unsigned int irq;





	printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries);

	printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries);
@@ -1603,10 +1602,10 @@ __apicdebuginit(void) print_IO_APIC(void) 
	}

	}

	}

	}

	printk(KERN_DEBUG "IRQ to pin mappings:\n");

	printk(KERN_DEBUG "IRQ to pin mappings:\n");

	for_each_irq_desc(irq, desc) {

	for_each_active_irq(irq) {

		struct irq_pin_list *entry;

		struct irq_pin_list *entry;





		cfg = get_irq_desc_chip_data(desc);

		cfg = get_irq_chip_data(irq);

		if (!cfg)

		if (!cfg)

			continue;

			continue;

		entry = cfg->irq_2_pin;

		entry = cfg->irq_2_pin;
@@ -2574,9 +2573,8 @@ static struct irq_chip ir_ioapic_chip __read_mostly = { 




static inline void init_IO_APIC_traps(void)

static inline void init_IO_APIC_traps(void)

{

{

	int irq;

	struct irq_desc *desc;

	struct irq_cfg *cfg;

	struct irq_cfg *cfg;

	unsigned int irq;





	/*

	/*

	 * NOTE! The local APIC isn't very good at handling

	 * NOTE! The local APIC isn't very good at handling
@@ -2589,8 +2587,8 @@ static inline void init_IO_APIC_traps(void) 
	 * Also, we've got to be careful not to trash gate

	 * Also, we've got to be careful not to trash gate

	 * 0x80, because int 0x80 is hm, kind of importantish. ;)

	 * 0x80, because int 0x80 is hm, kind of importantish. ;)

	 */

	 */

	for_each_irq_desc(irq, desc) {

	for_each_active_irq(irq) {

		cfg = get_irq_desc_chip_data(desc);

		cfg = get_irq_chip_data(irq);

		if (IO_APIC_IRQ(irq) && cfg && !cfg->vector) {

		if (IO_APIC_IRQ(irq) && cfg && !cfg->vector) {

			/*

			/*

			 * Hmm.. We don't have an entry for this,

			 * Hmm.. We don't have an entry for this,
@@ -2601,7 +2599,7 @@ static inline void init_IO_APIC_traps(void) 
				legacy_pic->make_irq(irq);

				legacy_pic->make_irq(irq);

			else

			else

				/* Strange. Oh, well.. */

				/* Strange. Oh, well.. */

				desc->chip = &no_irq_chip;

				set_irq_chip(irq, &no_irq_chip);

		}

		}

	}

	}

}

}