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genirq: Sanitize irq_data accessors 

Get the data structure from the core and provide inline wrappers to
access the irq_data members.

Provide accessor inlines for irq_data as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2010-09-28 17:34:01 +02:00
parent 442471848f
commit f303a6dd12
2 changed files with 66 additions and 4 deletions
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62
include/linux/irq.h
View File

@ -85,6 +85,7 @@ typedef void (*irq_flow_handler_t)(unsigned int irq,
#endif
struct msi_desc;
struct irq_2_iommu;
/**
* struct irq_data - per irq and irq chip data passed down to chip functions
@ -332,11 +333,64 @@ extern int set_irq_data(unsigned int irq, void *data);
extern int set_irq_chip_data(unsigned int irq, void *data);
extern int set_irq_type(unsigned int irq, unsigned int type);
extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
extern struct irq_data *irq_get_irq_data(unsigned int irq);
#define get_irq_chip(irq) (irq_to_desc(irq)->irq_data.chip)
#define get_irq_chip_data(irq) (irq_to_desc(irq)->irq_data.chip_data)
#define get_irq_data(irq) (irq_to_desc(irq)->irq_data.handler_data)
#define get_irq_msi(irq) (irq_to_desc(irq)->irq_data.msi_desc)
static inline struct irq_chip *get_irq_chip(unsigned int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
return d ? d->chip : NULL;
}
static inline struct irq_chip *irq_data_get_irq_chip(struct irq_data *d)
{
return d->chip;
}
static inline void *get_irq_chip_data(unsigned int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
return d ? d->chip_data : NULL;
}
static inline void *irq_data_get_irq_chip_data(struct irq_data *d)
{
return d->chip_data;
}
static inline void *get_irq_data(unsigned int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
return d ? d->handler_data : NULL;
}
static inline void *irq_data_get_irq_data(struct irq_data *d)
{
return d->handler_data;
}
static inline struct msi_desc *get_irq_msi(unsigned int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
return d ? d->msi_desc : NULL;
}
static inline struct msi_desc *irq_data_get_msi(struct irq_data *d)
{
return d->msi_desc;
}
#ifdef CONFIG_INTR_REMAP
static inline struct irq_2_iommu *get_irq_iommu(unsigned int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
return d ? d->irq_2_iommu : NULL;
}
static inline struct irq_2_iommu *irq_data_get_iommu(struct irq_data *d)
{
return d->irq_2_iommu;
}
#endif
#endif /* CONFIG_GENERIC_HARDIRQS */

8
kernel/irq/chip.c
View File

@ -256,6 +256,14 @@ int set_irq_chip_data(unsigned int irq, void *data)
}
EXPORT_SYMBOL(set_irq_chip_data);
struct irq_data *irq_get_irq_data(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
return desc ? &desc->irq_data : NULL;
}
EXPORT_SYMBOL_GPL(irq_get_irq_data);
/**
* set_irq_nested_thread - Set/Reset the IRQ_NESTED_THREAD flag of an irq
*