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genirq: Introduce irq_do_set_affinity() to reduce duplicated code

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All invocations of chip->irq_set_affinity() are doing the same return
value checks. Let them all use a common function.

[ tglx: removed the silly likely while at it ]

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Jiang Liu <liuj97@gmail.com>
Cc: Keping Chen <chenkeping@huawei.com>
Link: http://lkml.kernel.org/r/1333120296-13563-3-git-send-email-jiang.liu@huawei.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jiang Liu 2012-03-30 23:11:34 +08:00 committed by Thomas Gleixner
parent 23812b9d9e
commit 818b0f3bfb
3 changed files with 27 additions and 28 deletions
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3
kernel/irq/internals.h
View File

@ -101,6 +101,9 @@ extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
extern void irq_set_thread_affinity(struct irq_desc *desc);
extern int irq_do_set_affinity(struct irq_data *data,
const struct cpumask *dest, bool force);
/* Inline functions for support of irq chips on slow busses */
static inline void chip_bus_lock(struct irq_desc *desc)
{

39
kernel/irq/manage.c
View File

@ -139,6 +139,25 @@ static inline void
irq_get_pending(struct cpumask *mask, struct irq_desc *desc) { }
#endif
int irq_do_set_affinity(struct irq_data *data, const struct cpumask *mask,
bool force)
{
struct irq_desc *desc = irq_data_to_desc(data);
struct irq_chip *chip = irq_data_get_irq_chip(data);
int ret;
ret = chip->irq_set_affinity(data, mask, false);
switch (ret) {
case IRQ_SET_MASK_OK:
cpumask_copy(data->affinity, mask);
case IRQ_SET_MASK_OK_NOCOPY:
irq_set_thread_affinity(desc);
ret = 0;
}
return ret;
}
int __irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask)
{
struct irq_chip *chip = irq_data_get_irq_chip(data);
@ -149,14 +168,7 @@ int __irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask)
return -EINVAL;
if (irq_can_move_pcntxt(data)) {
ret = chip->irq_set_affinity(data, mask, false);
switch (ret) {
case IRQ_SET_MASK_OK:
cpumask_copy(data->affinity, mask);
case IRQ_SET_MASK_OK_NOCOPY:
irq_set_thread_affinity(desc);
ret = 0;
}
ret = irq_do_set_affinity(data, mask, false);
} else {
irqd_set_move_pending(data);
irq_copy_pending(desc, mask);
@ -280,9 +292,8 @@ EXPORT_SYMBOL_GPL(irq_set_affinity_notifier);
static int
setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
{
struct irq_chip *chip = irq_desc_get_chip(desc);
struct cpumask *set = irq_default_affinity;
int ret, node = desc->irq_data.node;
int node = desc->irq_data.node;
/* Excludes PER_CPU and NO_BALANCE interrupts */
if (!irq_can_set_affinity(irq))
@ -308,13 +319,7 @@ setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
if (cpumask_intersects(mask, nodemask))
cpumask_and(mask, mask, nodemask);
}
ret = chip->irq_set_affinity(&desc->irq_data, mask, false);
switch (ret) {
case IRQ_SET_MASK_OK:
cpumask_copy(desc->irq_data.affinity, mask);
case IRQ_SET_MASK_OK_NOCOPY:
irq_set_thread_affinity(desc);
}
irq_do_set_affinity(&desc->irq_data, mask, false);
return 0;
}
#else

13
kernel/irq/migration.c
View File

@ -42,17 +42,8 @@ void irq_move_masked_irq(struct irq_data *idata)
* For correct operation this depends on the caller
* masking the irqs.
*/
if (likely(cpumask_any_and(desc->pending_mask, cpu_online_mask)
< nr_cpu_ids)) {
int ret = chip->irq_set_affinity(&desc->irq_data,
desc->pending_mask, false);
switch (ret) {
case IRQ_SET_MASK_OK:
cpumask_copy(desc->irq_data.affinity, desc->pending_mask);
case IRQ_SET_MASK_OK_NOCOPY:
irq_set_thread_affinity(desc);
}
}
if (cpumask_any_and(desc->pending_mask, cpu_online_mask) < nr_cpu_ids)
irq_do_set_affinity(&desc->irq_data, desc->pending_mask, false);
cpumask_clear(desc->pending_mask);
}