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generic: sparse irqs: use irq_desc() together with dyn_array, instead of irq_desc[]

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add CONFIG_HAVE_SPARSE_IRQ to for use condensed array.
Get rid of irq_desc[] array assumptions.

Preallocate 32 irq_desc, and irq_desc() will try to get more.

( No change in functionality is expected anywhere, except the odd build
  failure where we missed a code site or where a crossing commit itroduces
  new irq_desc[] usage. )

v2: according to Eric, change get_irq_desc() to irq_desc()

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 20:50:05 -07:00
committed by Ingo Molnar
parent bfea1238be
commit 08678b0841
28 changed files with 405 additions and 188 deletions
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14
kernel/irq/migration.c
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@ -3,18 +3,18 @@
void set_pending_irq(unsigned int irq, cpumask_t mask)
{
struct irq_desc *desc = irq_desc + irq;
struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
spin_lock_irqsave(&desc->lock, flags);
desc->status |= IRQ_MOVE_PENDING;
irq_desc[irq].pending_mask = mask;
desc->pending_mask = mask;
spin_unlock_irqrestore(&desc->lock, flags);
}
void move_masked_irq(int irq)
{
struct irq_desc *desc = irq_desc + irq;
struct irq_desc *desc = irq_to_desc(irq);
cpumask_t tmp;
if (likely(!(desc->status & IRQ_MOVE_PENDING)))
@ -30,7 +30,7 @@ void move_masked_irq(int irq)
desc->status &= ~IRQ_MOVE_PENDING;
if (unlikely(cpus_empty(irq_desc[irq].pending_mask)))
if (unlikely(cpus_empty(desc->pending_mask)))
return;
if (!desc->chip->set_affinity)
@ -38,7 +38,7 @@ void move_masked_irq(int irq)
assert_spin_locked(&desc->lock);
cpus_and(tmp, irq_desc[irq].pending_mask, cpu_online_map);
cpus_and(tmp, desc->pending_mask, cpu_online_map);
/*
* If there was a valid mask to work with, please
@ -55,12 +55,12 @@ void move_masked_irq(int irq)
if (likely(!cpus_empty(tmp))) {
desc->chip->set_affinity(irq,tmp);
}
cpus_clear(irq_desc[irq].pending_mask);
cpus_clear(desc->pending_mask);
}
void move_native_irq(int irq)
{
struct irq_desc *desc = irq_desc + irq;
struct irq_desc *desc = irq_to_desc(irq);
if (likely(!(desc->status & IRQ_MOVE_PENDING)))
return;