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Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull genirq updates from Thomas Gleixner.

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Adjust irq thread affinity on IRQ_SET_MASK_OK_NOCOPY return value
  genirq: Respect NUMA node affinity in setup_irq_irq affinity()
  genirq: Get rid of unneeded force parameter in irq_finalize_oneshot()
  genirq: Minor readablity improvement in irq_wake_thread()
This commit is contained in:
Linus Torvalds 2012-03-30 18:08:05 -07:00
parent 3a0d184943 f5cb92ac82
commit f558c27238
3 changed files with 30 additions and 15 deletions
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16
kernel/irq/handle.c
View File

@ -54,14 +54,18 @@ static void warn_no_thread(unsigned int irq, struct irqaction *action)
static void irq_wake_thread(struct irq_desc *desc, struct irqaction *action)
{
/*
* Wake up the handler thread for this action. In case the
* thread crashed and was killed we just pretend that we
* handled the interrupt. The hardirq handler has disabled the
* device interrupt, so no irq storm is lurking. If the
* In case the thread crashed and was killed we just pretend that
* we handled the interrupt. The hardirq handler has disabled the
* device interrupt, so no irq storm is lurking.
*/
if (action->thread->flags & PF_EXITING)
return;
/*
* Wake up the handler thread for this action. If the
* RUNTHREAD bit is already set, nothing to do.
*/
if ((action->thread->flags & PF_EXITING) ||
test_and_set_bit(IRQTF_RUNTHREAD, &action->thread_flags))
if (test_and_set_bit(IRQTF_RUNTHREAD, &action->thread_flags))
return;
/*

19
kernel/irq/manage.c
View File

@ -282,7 +282,7 @@ 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;
int ret, node = desc->irq_data.node;
/* Excludes PER_CPU and NO_BALANCE interrupts */
if (!irq_can_set_affinity(irq))
@ -301,6 +301,13 @@ setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
}
cpumask_and(mask, cpu_online_mask, set);
if (node != NUMA_NO_NODE) {
const struct cpumask *nodemask = cpumask_of_node(node);
/* make sure at least one of the cpus in nodemask is online */
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:
@ -645,7 +652,7 @@ static int irq_wait_for_interrupt(struct irqaction *action)
* is marked MASKED.
*/
static void irq_finalize_oneshot(struct irq_desc *desc,
struct irqaction *action, bool force)
struct irqaction *action)
{
if (!(desc->istate & IRQS_ONESHOT))
return;
@ -679,7 +686,7 @@ again:
* we would clear the threads_oneshot bit of this thread which
* was just set.
*/
if (!force && test_bit(IRQTF_RUNTHREAD, &action->thread_flags))
if (test_bit(IRQTF_RUNTHREAD, &action->thread_flags))
goto out_unlock;
desc->threads_oneshot &= ~action->thread_mask;
@ -739,7 +746,7 @@ irq_forced_thread_fn(struct irq_desc *desc, struct irqaction *action)
local_bh_disable();
ret = action->thread_fn(action->irq, action->dev_id);
irq_finalize_oneshot(desc, action, false);
irq_finalize_oneshot(desc, action);
local_bh_enable();
return ret;
}
@ -755,7 +762,7 @@ static irqreturn_t irq_thread_fn(struct irq_desc *desc,
irqreturn_t ret;
ret = action->thread_fn(action->irq, action->dev_id);
irq_finalize_oneshot(desc, action, false);
irq_finalize_oneshot(desc, action);
return ret;
}
@ -844,7 +851,7 @@ void exit_irq_thread(void)
wake_threads_waitq(desc);
/* Prevent a stale desc->threads_oneshot */
irq_finalize_oneshot(desc, action, true);
irq_finalize_oneshot(desc, action);
}
static void irq_setup_forced_threading(struct irqaction *new)

10
kernel/irq/migration.c
View File

@ -43,12 +43,16 @@ void irq_move_masked_irq(struct irq_data *idata)
* masking the irqs.
*/
if (likely(cpumask_any_and(desc->pending_mask, cpu_online_mask)
< nr_cpu_ids))
if (!chip->irq_set_affinity(&desc->irq_data,
desc->pending_mask, false)) {
< 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);
}
}
cpumask_clear(desc->pending_mask);
}