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x86: make 32bit support per_cpu vector

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so we can merge io_apic_32.c and io_apic_64.c

v2: Use cpu_online_map as target cpus for bigsmp, just like 64-bit is doing.

Also remove some unused TARGET_CPUS macro.

v3: need to check if desc is null in smp_irq_move_cleanup

also migration needs to reset vector too, so copy __target_IO_APIC_irq
from 64bit.

(the duplication will go away once the two files are unified.)

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
2008-08-19 20:50:28 -07:00
committed by Ingo Molnar
parent 199751d715
commit 497c9a195d
19 changed files with 581 additions and 316 deletions
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18
arch/x86/kernel/irq_32.c
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@ -223,21 +223,25 @@ unsigned int do_IRQ(struct pt_regs *regs)
{
struct pt_regs *old_regs;
/* high bit used in ret_from_ code */
int overflow, irq = ~regs->orig_ax;
int overflow;
unsigned vector = ~regs->orig_ax;
struct irq_desc *desc;
unsigned irq;
desc = irq_to_desc(irq);
if (unlikely(!desc)) {
printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
__func__, irq);
BUG();
}
old_regs = set_irq_regs(regs);
irq_enter();
irq = __get_cpu_var(vector_irq)[vector];
overflow = check_stack_overflow();
desc = irq_to_desc(irq);
if (unlikely(!desc)) {
printk(KERN_EMERG "%s: cannot handle IRQ %d vector %#x\n",
__func__, irq, vector);
BUG();
}
if (!execute_on_irq_stack(overflow, desc, irq)) {
if (unlikely(overflow))
print_stack_overflow();