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genirq: Convert irq_desc.lock to raw_spinlock

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Convert locks which cannot be sleeping locks in preempt-rt to
raw_spinlocks.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
2009-11-17 16:46:45 +01:00
parent 9f5a5621e7
commit 239007b844
43 changed files with 240 additions and 240 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
kernel/irq/handle.c
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@ -80,7 +80,7 @@ static struct irq_desc irq_desc_init = {
.chip = &no_irq_chip,
.handle_irq = handle_bad_irq,
.depth = 1,
.lock = __SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
.lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
};
void __ref init_kstat_irqs(struct irq_desc *desc, int node, int nr)
@ -108,7 +108,7 @@ static void init_one_irq_desc(int irq, struct irq_desc *desc, int node)
{
memcpy(desc, &irq_desc_init, sizeof(struct irq_desc));
spin_lock_init(&desc->lock);
raw_spin_lock_init(&desc->lock);
desc->irq = irq;
#ifdef CONFIG_SMP
desc->node = node;
@ -130,7 +130,7 @@ static void init_one_irq_desc(int irq, struct irq_desc *desc, int node)
/*
* Protect the sparse_irqs:
*/
DEFINE_SPINLOCK(sparse_irq_lock);
DEFINE_RAW_SPINLOCK(sparse_irq_lock);
struct irq_desc **irq_desc_ptrs __read_mostly;
@ -141,7 +141,7 @@ static struct irq_desc irq_desc_legacy[NR_IRQS_LEGACY] __cacheline_aligned_in_sm
.chip = &no_irq_chip,
.handle_irq = handle_bad_irq,
.depth = 1,
.lock = __SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
.lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
}
};
@ -212,7 +212,7 @@ struct irq_desc * __ref irq_to_desc_alloc_node(unsigned int irq, int node)
if (desc)
return desc;
spin_lock_irqsave(&sparse_irq_lock, flags);
raw_spin_lock_irqsave(&sparse_irq_lock, flags);
/* We have to check it to avoid races with another CPU */
desc = irq_desc_ptrs[irq];
@ -234,7 +234,7 @@ struct irq_desc * __ref irq_to_desc_alloc_node(unsigned int irq, int node)
irq_desc_ptrs[irq] = desc;
out_unlock:
spin_unlock_irqrestore(&sparse_irq_lock, flags);
raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
return desc;
}
@ -247,7 +247,7 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
.chip = &no_irq_chip,
.handle_irq = handle_bad_irq,
.depth = 1,
.lock = __SPIN_LOCK_UNLOCKED(irq_desc->lock),
.lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc->lock),
}
};
@ -473,7 +473,7 @@ unsigned int __do_IRQ(unsigned int irq)
return 1;
}
spin_lock(&desc->lock);
raw_spin_lock(&desc->lock);
if (desc->chip->ack)
desc->chip->ack(irq);
/*
@ -517,13 +517,13 @@ unsigned int __do_IRQ(unsigned int irq)
for (;;) {
irqreturn_t action_ret;
spin_unlock(&desc->lock);
raw_spin_unlock(&desc->lock);
action_ret = handle_IRQ_event(irq, action);
if (!noirqdebug)
note_interrupt(irq, desc, action_ret);
spin_lock(&desc->lock);
raw_spin_lock(&desc->lock);
if (likely(!(desc->status & IRQ_PENDING)))
break;
desc->status &= ~IRQ_PENDING;
@ -536,7 +536,7 @@ out:
* disabled while the handler was running.
*/
desc->chip->end(irq);
spin_unlock(&desc->lock);
raw_spin_unlock(&desc->lock);
return 1;
}