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x86, ioapic: Improve handling of i8259A irq init 

Since we already track the number of legacy vectors by nr_legacy_irqs, we
can avoid use static vector allocations -- we can use dynamic one.

Signed-off-by: Alek Du <alek.du@intel.com>
LKML-Reference: <43F901BD926A4E43B106BF17856F07559FB80D01@orsmsx508.amr.corp.intel.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Alek Du 2009-09-07 16:25:45 +08:00 committed by H. Peter Anvin
parent 9325a28ce2
commit d39f6495f6
1 changed files with 4 additions and 19 deletions
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23
arch/x86/kernel/apic/io_apic.c
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@ -140,27 +140,10 @@ static struct irq_pin_list *get_one_free_irq_2_pin(int node)
/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
#ifdef CONFIG_SPARSE_IRQ
static struct irq_cfg irq_cfgx[] = {
static struct irq_cfg irq_cfgx[NR_IRQS_LEGACY];
#else
static struct irq_cfg irq_cfgx[NR_IRQS] = {
static struct irq_cfg irq_cfgx[NR_IRQS];
#endif
[0] = { .vector = IRQ0_VECTOR, },
[1] = { .vector = IRQ1_VECTOR, },
[2] = { .vector = IRQ2_VECTOR, },
[3] = { .vector = IRQ3_VECTOR, },
[4] = { .vector = IRQ4_VECTOR, },
[5] = { .vector = IRQ5_VECTOR, },
[6] = { .vector = IRQ6_VECTOR, },
[7] = { .vector = IRQ7_VECTOR, },
[8] = { .vector = IRQ8_VECTOR, },
[9] = { .vector = IRQ9_VECTOR, },
[10] = { .vector = IRQ10_VECTOR, },
[11] = { .vector = IRQ11_VECTOR, },
[12] = { .vector = IRQ12_VECTOR, },
[13] = { .vector = IRQ13_VECTOR, },
[14] = { .vector = IRQ14_VECTOR, },
[15] = { .vector = IRQ15_VECTOR, },
};
void __init io_apic_disable_legacy(void)
{
@ -181,6 +164,8 @@ int __init arch_early_irq_init(void)
node= cpu_to_node(boot_cpu_id);
for (i = 0; i < count; i++) {
if (i < nr_legacy_irqs)
cfg[i].vector = IRQ0_VECTOR + i;
desc = irq_to_desc(i);
desc->chip_data = &cfg[i];
zalloc_cpumask_var_node(&cfg[i].domain, GFP_NOWAIT, node);