08678b0841
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>
75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
|
|
#include <linux/irq.h>
|
|
|
|
void set_pending_irq(unsigned int irq, cpumask_t mask)
|
|
{
|
|
struct irq_desc *desc = irq_to_desc(irq);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&desc->lock, flags);
|
|
desc->status |= IRQ_MOVE_PENDING;
|
|
desc->pending_mask = mask;
|
|
spin_unlock_irqrestore(&desc->lock, flags);
|
|
}
|
|
|
|
void move_masked_irq(int irq)
|
|
{
|
|
struct irq_desc *desc = irq_to_desc(irq);
|
|
cpumask_t tmp;
|
|
|
|
if (likely(!(desc->status & IRQ_MOVE_PENDING)))
|
|
return;
|
|
|
|
/*
|
|
* Paranoia: cpu-local interrupts shouldn't be calling in here anyway.
|
|
*/
|
|
if (CHECK_IRQ_PER_CPU(desc->status)) {
|
|
WARN_ON(1);
|
|
return;
|
|
}
|
|
|
|
desc->status &= ~IRQ_MOVE_PENDING;
|
|
|
|
if (unlikely(cpus_empty(desc->pending_mask)))
|
|
return;
|
|
|
|
if (!desc->chip->set_affinity)
|
|
return;
|
|
|
|
assert_spin_locked(&desc->lock);
|
|
|
|
cpus_and(tmp, desc->pending_mask, cpu_online_map);
|
|
|
|
/*
|
|
* If there was a valid mask to work with, please
|
|
* do the disable, re-program, enable sequence.
|
|
* This is *not* particularly important for level triggered
|
|
* but in a edge trigger case, we might be setting rte
|
|
* when an active trigger is comming in. This could
|
|
* cause some ioapics to mal-function.
|
|
* Being paranoid i guess!
|
|
*
|
|
* For correct operation this depends on the caller
|
|
* masking the irqs.
|
|
*/
|
|
if (likely(!cpus_empty(tmp))) {
|
|
desc->chip->set_affinity(irq,tmp);
|
|
}
|
|
cpus_clear(desc->pending_mask);
|
|
}
|
|
|
|
void move_native_irq(int irq)
|
|
{
|
|
struct irq_desc *desc = irq_to_desc(irq);
|
|
|
|
if (likely(!(desc->status & IRQ_MOVE_PENDING)))
|
|
return;
|
|
|
|
if (unlikely(desc->status & IRQ_DISABLED))
|
|
return;
|
|
|
|
desc->chip->mask(irq);
|
|
move_masked_irq(irq);
|
|
desc->chip->unmask(irq);
|
|
}
|
|
|