AcoSail/kernel_optimize_test
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x86: Use sane enumeration

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

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2010-09-30 11:26:43 +02:00
parent 48b2650196
commit ad9f43340f
1 changed files with 10 additions and 12 deletions
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22
arch/x86/kernel/apic/io_apic.c
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@ -1160,7 +1160,6 @@ void __setup_vector_irq(int cpu)
/* Initialize vector_irq on a new cpu */
int irq, vector;
struct irq_cfg *cfg;
struct irq_desc *desc;
/*
* 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);
/* Mark the inuse vectors */
for_each_irq_desc(irq, desc) {
cfg = get_irq_desc_chip_data(desc);
for_each_active_irq(irq) {
cfg = get_irq_chip_data(irq);
if (!cfg)
continue;
/*
* If it is a legacy IRQ handled by the legacy PIC, this cpu
* 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;
unsigned long flags;
struct irq_cfg *cfg;
struct irq_desc *desc;
unsigned int irq;
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");
for_each_irq_desc(irq, desc) {
for_each_active_irq(irq) {
struct irq_pin_list *entry;
cfg = get_irq_desc_chip_data(desc);
cfg = get_irq_chip_data(irq);
if (!cfg)
continue;
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)
{
int irq;
struct irq_desc *desc;
struct irq_cfg *cfg;
unsigned int irq;
/*
* 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
* 0x80, because int 0x80 is hm, kind of importantish. ;)
*/
for_each_irq_desc(irq, desc) {
cfg = get_irq_desc_chip_data(desc);
for_each_active_irq(irq) {
cfg = get_irq_chip_data(irq);
if (IO_APIC_IRQ(irq) && cfg && !cfg->vector) {
/*
* 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);
else
/* Strange. Oh, well.. */
desc->chip = &no_irq_chip;
set_irq_chip(irq, &no_irq_chip);
}
}
}