dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

genirq: Move IRQ_AFFINITY_SET to core 

Keep status in sync until last abuser is gone.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2011-02-08 17:22:00 +01:00
parent bce43032ad
commit 2bdd10558c
5 changed files with 32 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
include/linux/irq.h
View File

@ -60,6 +60,7 @@ typedef void (*irq_flow_handler_t)(unsigned int irq,
#define IRQ_MASKED 0x00002000 /* DEPRECATED */
/* DEPRECATED use irq_setaffinity_pending() instead*/
#define IRQ_MOVE_PENDING 0x00004000
#define IRQ_AFFINITY_SET 0x02000000 /* DEPRECATED */
#endif
#define IRQ_LEVEL 0x00008000 /* IRQ level triggered */
@ -70,7 +71,6 @@ typedef void (*irq_flow_handler_t)(unsigned int irq,
#define IRQ_WAKEUP 0x00100000 /* IRQ triggers system wakeup */
#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*/
#define IRQ_NESTED_THREAD 0x10000000 /* IRQ is nested into another, no own handler thread */
#define IRQF_MODIFY_MASK \
@ -134,12 +134,14 @@ struct irq_data {
* IRQD_SETAFFINITY_PENDING - Affinity setting is pending
* IRQD_NO_BALANCING - Balancing disabled for this IRQ
* IRQD_PER_CPU - Interrupt is per cpu
* IRQD_AFFINITY_SET - Interrupt affinity was set
*/
enum {
/* Bit 0 - 7 reserved for TYPE will use later */
IRQD_SETAFFINITY_PENDING = (1 << 8),
IRQD_NO_BALANCING = (1 << 10),
IRQD_PER_CPU = (1 << 11),
IRQD_AFFINITY_SET = (1 << 12),
};
static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
@ -157,6 +159,11 @@ static inline bool irqd_can_balance(struct irq_data *d)
return !(d->state_use_accessors & (IRQD_PER_CPU | IRQD_NO_BALANCING));
}
static inline bool irqd_affinity_was_set(struct irq_data *d)
{
return d->state_use_accessors & IRQD_AFFINITY_SET;
}
/**
* struct irq_chip - hardware interrupt chip descriptor
*

11
kernel/irq/compat.h
View File

@ -46,6 +46,15 @@ static inline void irq_compat_clr_move_pending(struct irq_desc *desc)
{
desc->status &= ~IRQ_MOVE_PENDING;
}
static inline void irq_compat_set_affinity(struct irq_desc *desc)
{
desc->status |= IRQ_AFFINITY_SET;
}
static inline void irq_compat_clr_affinity(struct irq_desc *desc)
{
desc->status &= ~IRQ_AFFINITY_SET;
}
#else
static inline void irq_compat_set_progress(struct irq_desc *desc) { }
static inline void irq_compat_clr_progress(struct irq_desc *desc) { }
@ -57,5 +66,7 @@ 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) { }
static inline void irq_compat_set_affinity(struct irq_desc *desc) { }
static inline void irq_compat_clr_affinity(struct irq_desc *desc) { }
#endif

4
kernel/irq/internals.h
View File

@ -150,3 +150,7 @@ static inline void irqd_set(struct irq_data *d, unsigned int mask)
d->state_use_accessors |= mask;
}
static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
{
return d->state_use_accessors & mask;
}

11
kernel/irq/manage.c
View File

@ -164,7 +164,8 @@ int irq_set_affinity(unsigned int irq, const struct cpumask *mask)
kref_get(&desc->affinity_notify->kref);
schedule_work(&desc->affinity_notify->work);
}
desc->status |= IRQ_AFFINITY_SET;
irq_compat_set_affinity(desc);
irqd_set(&desc->irq_data, IRQD_AFFINITY_SET);
raw_spin_unlock_irqrestore(&desc->lock, flags);
return ret;
}
@ -272,12 +273,14 @@ setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
* Preserve an userspace affinity setup, but make sure that
* one of the targets is online.
*/
if (desc->status & (IRQ_AFFINITY_SET)) {
if (irqd_has_set(&desc->irq_data, IRQD_AFFINITY_SET)) {
if (cpumask_intersects(desc->irq_data.affinity,
cpu_online_mask))
set = desc->irq_data.affinity;
else
desc->status &= ~IRQ_AFFINITY_SET;
else {
irq_compat_clr_affinity(desc);
irqd_clear(&desc->irq_data, IRQD_AFFINITY_SET);
}
}
cpumask_and(mask, cpu_online_mask, set);

2
kernel/irq/settings.h
View File

@ -29,6 +29,8 @@ enum {
#define IRQ_PER_CPU GOT_YOU_MORON
#undef IRQ_NO_BALANCING
#define IRQ_NO_BALANCING GOT_YOU_MORON
#undef IRQ_AFFINITY_SET
#define IRQ_AFFINITY_SET GOT_YOU_MORON
#undef IRQF_MODIFY_MASK
#define IRQF_MODIFY_MASK GOT_YOU_MORON