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genirq: use inline function for irq_to_desc 

For the non sparse irq case an inline function is perfectly fine.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2008-10-15 14:31:29 +02:00 committed by Ingo Molnar
parent 70dd4d992a
commit c6b7674f32
2 changed files with 13 additions and 16 deletions
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15
include/linux/irq.h
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@ -204,8 +204,6 @@ struct irq_desc {
const char *name;
} ____cacheline_internodealigned_in_smp;
extern struct irq_desc *irq_to_desc(unsigned int irq);
extern struct irq_desc *irq_to_desc_alloc(unsigned int irq);
#ifndef CONFIG_HAVE_SPARSE_IRQ
@ -216,8 +214,21 @@ extern struct irq_desc irq_desc[NR_IRQS];
extern struct irq_desc *irq_desc;
#endif
static inline struct irq_desc *irq_to_desc(unsigned int irq)
{
return (irq < nr_irqs) ? irq_desc + irq : NULL;
}
static inline struct irq_desc *irq_to_desc_alloc(unsigned int irq)
{
return irq_to_desc(irq);
}
#else
extern struct irq_desc *irq_to_desc(unsigned int irq);
extern struct irq_desc *irq_to_desc_alloc(unsigned int irq);
extern struct irq_desc *sparse_irqs;
#define for_each_irq_desc(irqX, desc) \
for (desc = sparse_irqs, irqX = desc->irq; desc; desc = desc->next, irqX = desc ? desc->irq : -1U)

14
kernel/irq/handle.c
View File

@ -262,20 +262,6 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
#endif
#ifndef CONFIG_HAVE_SPARSE_IRQ
struct irq_desc *irq_to_desc(unsigned int irq)
{
if (irq < nr_irqs)
return &irq_desc[irq];
return NULL;
}
struct irq_desc *irq_to_desc_alloc(unsigned int irq)
{
return irq_to_desc(irq);
}
#endif
/*
* What should we do if we get a hw irq event on an illegal vector?
* Each architecture has to answer this themself.