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genirq: Add IRQ_MOVE_PENDING to irq_data.state

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chip implementations need to know about it. Keep status in sync until
all users are fixed. 

Accessor function: irqd_is_setaffinity_pending(irqdata)

Coders who access them directly will be tracked down and slapped with
stinking trouts.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2011-02-05 15:20:04 +01:00
parent 91c4991781
commit f230b6d5c4
7 changed files with 52 additions and 8 deletions
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20
include/linux/irq.h
View File

@ -58,15 +58,16 @@ typedef void (*irq_flow_handler_t)(unsigned int irq,
#define IRQ_DISABLED 0x00000800 /* DEPRECATED */
#define IRQ_PENDING 0x00001000 /* DEPRECATED */
#define IRQ_MASKED 0x00002000 /* DEPRECATED */
/* DEPRECATED use irq_setaffinity_pending() instead*/
#define IRQ_MOVE_PENDING 0x00004000
#endif
#define IRQ_LEVEL 0x00004000 /* IRQ level triggered */
#define IRQ_LEVEL 0x00008000 /* IRQ level triggered */
#define IRQ_PER_CPU 0x00010000 /* IRQ is per CPU */
#define IRQ_NOPROBE 0x00020000 /* IRQ is not valid for probing */
#define IRQ_NOREQUEST 0x00040000 /* IRQ cannot be requested */
#define IRQ_NOAUTOEN 0x00080000 /* IRQ will not be enabled on request irq */
#define IRQ_WAKEUP 0x00100000 /* IRQ triggers system wakeup */
#define IRQ_MOVE_PENDING 0x00200000 /* need to re-target IRQ destination */
#define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */
#define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */
#define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/
@ -128,6 +129,21 @@ struct irq_data {
#endif
};
/*
* Bit masks for irq_data.state
*
* IRQD_SETAFFINITY_PENDING - Affinity setting is pending
*/
enum {
/* Bit 0 - 7 reserved for TYPE will use later */
IRQD_SETAFFINITY_PENDING = (1 << 8),
};
static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
{
return d->state_use_accessors & IRQD_SETAFFINITY_PENDING;
}
/**
* struct irq_chip - hardware interrupt chip descriptor
*

11
kernel/irq/compat.h
View File

@ -37,6 +37,15 @@ static inline void irq_compat_clr_masked(struct irq_desc *desc)
{
desc->status &= ~IRQ_MASKED;
}
static inline void irq_compat_set_move_pending(struct irq_desc *desc)
{
desc->status |= IRQ_MOVE_PENDING;
}
static inline void irq_compat_clr_move_pending(struct irq_desc *desc)
{
desc->status &= ~IRQ_MOVE_PENDING;
}
#else
static inline void irq_compat_set_progress(struct irq_desc *desc) { }
static inline void irq_compat_clr_progress(struct irq_desc *desc) { }
@ -46,5 +55,7 @@ static inline void irq_compat_set_pending(struct irq_desc *desc) { }
static inline void irq_compat_clr_pending(struct irq_desc *desc) { }
static inline void irq_compat_set_masked(struct irq_desc *desc) { }
static inline void irq_compat_clr_masked(struct irq_desc *desc) { }
static inline void irq_compat_set_move_pending(struct irq_desc *desc) { }
static inline void irq_compat_clr_move_pending(struct irq_desc *desc) { }
#endif

15
kernel/irq/internals.h
View File

@ -124,6 +124,21 @@ static inline void chip_bus_sync_unlock(struct irq_desc *desc)
desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
}
/*
* Manipulation functions for irq_data.state
*/
static inline void irqd_set_move_pending(struct irq_data *d)
{
d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;
irq_compat_set_move_pending(irq_data_to_desc(d));
}
static inline void irqd_clr_move_pending(struct irq_data *d)
{
d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
irq_compat_clr_move_pending(irq_data_to_desc(d));
}
/*
* Debugging printout:
*/

4
kernel/irq/manage.c
View File

@ -107,7 +107,7 @@ static inline bool irq_can_move_pcntxt(struct irq_desc *desc)
}
static inline bool irq_move_pending(struct irq_desc *desc)
{
return desc->status & IRQ_MOVE_PENDING;
return irqd_is_setaffinity_pending(&desc->irq_data);
}
static inline void
irq_copy_pending(struct irq_desc *desc, const struct cpumask *mask)
@ -156,7 +156,7 @@ int irq_set_affinity(unsigned int irq, const struct cpumask *mask)
ret = 0;
}
} else {
desc->status |= IRQ_MOVE_PENDING;
irqd_set_move_pending(&desc->irq_data);
irq_copy_pending(desc, mask);
}

6
kernel/irq/migration.c
View File

@ -9,7 +9,7 @@ void move_masked_irq(int irq)
struct irq_desc *desc = irq_to_desc(irq);
struct irq_chip *chip = desc->irq_data.chip;
if (likely(!(desc->status & IRQ_MOVE_PENDING)))
if (likely(!irqd_is_setaffinity_pending(&desc->irq_data)))
return;
/*
@ -20,7 +20,7 @@ void move_masked_irq(int irq)
return;
}
desc->status &= ~IRQ_MOVE_PENDING;
irqd_clr_move_pending(&desc->irq_data);
if (unlikely(cpumask_empty(desc->pending_mask)))
return;
@ -58,7 +58,7 @@ void move_native_irq(int irq)
struct irq_desc *desc = irq_to_desc(irq);
bool masked;
if (likely(!(desc->status & IRQ_MOVE_PENDING)))
if (likely(!irqd_is_setaffinity_pending(&desc->irq_data)))
return;
if (unlikely(desc->istate & IRQS_DISABLED))

2
kernel/irq/proc.c
View File

@ -25,7 +25,7 @@ static int irq_affinity_proc_show(struct seq_file *m, void *v)
const struct cpumask *mask = desc->irq_data.affinity;
#ifdef CONFIG_GENERIC_PENDING_IRQ
if (desc->status & IRQ_MOVE_PENDING)
if (irqd_is_setaffinity_pending(&desc->irq_data))
mask = desc->pending_mask;
#endif
seq_cpumask(m, mask);

2
kernel/irq/settings.h
View File

@ -20,3 +20,5 @@ enum {
#define IRQ_MASKED GOT_YOU_MORON
#undef IRQ_WAKEUP
#define IRQ_WAKEUP GOT_YOU_MORON
#undef IRQ_MOVE_PENDING
#define IRQ_MOVE_PENDING GOT_YOU_MORON