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x86: use NR_IRQS_LEGACY

Browse source 
Impact: cleanup

Introduce NR_IRQS_LEGACY instead of hard coded number.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2008-12-05 18:58:32 -08:00 committed by Ingo Molnar
parent 0b8f1efad3
commit 99d093d128
5 changed files with 12 additions and 10 deletions
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2
arch/x86/include/asm/irq_vectors.h
View file

@ -101,6 +101,8 @@
#define LAST_VM86_IRQ 15 #define LAST_VM86_IRQ 15
#define invalid_vm86_irq(irq) ((irq) < 3 || (irq) > 15) #define invalid_vm86_irq(irq) ((irq) < 3 || (irq) > 15)
#define NR_IRQS_LEGACY 16
#if defined(CONFIG_X86_IO_APIC) && !defined(CONFIG_X86_VOYAGER) #if defined(CONFIG_X86_IO_APIC) && !defined(CONFIG_X86_VOYAGER)
#ifndef CONFIG_SPARSE_IRQ #ifndef CONFIG_SPARSE_IRQ

10
arch/x86/kernel/io_apic.c
View file

@ -847,7 +847,7 @@ EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector);
*/ */
static int EISA_ELCR(unsigned int irq) static int EISA_ELCR(unsigned int irq)
{ {
if (irq < 16) { if (irq < NR_IRQS_LEGACY) {
unsigned int port = 0x4d0 + (irq >> 3); unsigned int port = 0x4d0 + (irq >> 3);
return (inb(port) >> (irq & 7)) & 1; return (inb(port) >> (irq & 7)) & 1;
} }
@ -1388,7 +1388,7 @@ static void setup_IO_APIC_irq(int apic, int pin, unsigned int irq,
} }
ioapic_register_intr(irq, trigger); ioapic_register_intr(irq, trigger);
if (irq < 16) if (irq < NR_IRQS_LEGACY)
disable_8259A_irq(irq); disable_8259A_irq(irq);
ioapic_write_entry(apic, pin, entry); ioapic_write_entry(apic, pin, entry);
@ -2080,7 +2080,7 @@ static unsigned int startup_ioapic_irq(unsigned int irq)
struct irq_cfg *cfg; struct irq_cfg *cfg;
spin_lock_irqsave(&ioapic_lock, flags); spin_lock_irqsave(&ioapic_lock, flags);
if (irq < 16) { if (irq < NR_IRQS_LEGACY) {
disable_8259A_irq(irq); disable_8259A_irq(irq);
if (i8259A_irq_pending(irq)) if (i8259A_irq_pending(irq))
was_pending = 1; was_pending = 1;
@ -2504,7 +2504,7 @@ static inline void init_IO_APIC_traps(void)
* so default to an old-fashioned 8259 * so default to an old-fashioned 8259
* interrupt if we can.. * interrupt if we can..
*/ */
if (irq < 16) if (irq < NR_IRQS_LEGACY)
make_8259A_irq(irq); make_8259A_irq(irq);
else else
/* Strange. Oh, well.. */ /* Strange. Oh, well.. */
@ -3794,7 +3794,7 @@ int io_apic_set_pci_routing (int ioapic, int pin, int irq, int triggering, int p
/* /*
* IRQs < 16 are already in the irq_2_pin[] map * IRQs < 16 are already in the irq_2_pin[] map
*/ */
if (irq >= 16) { if (irq >= NR_IRQS_LEGACY) {
cfg = desc->chip_data; cfg = desc->chip_data;
add_pin_to_irq_cpu(irq, cpu, ioapic, pin); add_pin_to_irq_cpu(irq, cpu, ioapic, pin);
} }

2
arch/x86/kernel/irqinit_32.c
View file

@ -68,7 +68,7 @@ void __init init_ISA_irqs (void)
/* /*
* 16 old-style INTA-cycle interrupts: * 16 old-style INTA-cycle interrupts:
*/ */
for (i = 0; i < 16; i++) { for (i = 0; i < NR_IRQS_LEGACY; i++) {
struct irq_desc *desc = irq_to_desc(i); struct irq_desc *desc = irq_to_desc(i);
desc->status = IRQ_DISABLED; desc->status = IRQ_DISABLED;

2
arch/x86/kernel/irqinit_64.c
View file

@ -142,7 +142,7 @@ void __init init_ISA_irqs(void)
init_bsp_APIC(); init_bsp_APIC();
init_8259A(0); init_8259A(0);
for (i = 0; i < 16; i++) { for (i = 0; i < NR_IRQS_LEGACY; i++) {
struct irq_desc *desc = irq_to_desc(i); struct irq_desc *desc = irq_to_desc(i);
desc->status = IRQ_DISABLED; desc->status = IRQ_DISABLED;

6
kernel/irq/handle.c
View file

@ -117,8 +117,8 @@ static DEFINE_SPINLOCK(sparse_irq_lock);
struct irq_desc *irq_desc_ptrs[NR_IRQS] __read_mostly; struct irq_desc *irq_desc_ptrs[NR_IRQS] __read_mostly;
static struct irq_desc irq_desc_legacy[16] __cacheline_aligned_in_smp = { static struct irq_desc irq_desc_legacy[NR_IRQS_LEGACY] __cacheline_aligned_in_smp = {
[0 ... 15] = { [0 ... NR_IRQS_LEGACY-1] = {
.irq = -1, .irq = -1,
.status = IRQ_DISABLED, .status = IRQ_DISABLED,
.chip = &no_irq_chip, .chip = &no_irq_chip,
@ -132,7 +132,7 @@ static struct irq_desc irq_desc_legacy[16] __cacheline_aligned_in_smp = {
}; };
/* FIXME: use bootmem alloc ...*/ /* FIXME: use bootmem alloc ...*/
static unsigned int kstat_irqs_legacy[16][NR_CPUS]; static unsigned int kstat_irqs_legacy[NR_IRQS_LEGACY][NR_CPUS];
void __init early_irq_init(void) void __init early_irq_init(void)
{ {