diff options
Diffstat (limited to 'kernel/irq/manage.c')
| -rw-r--r-- | kernel/irq/manage.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index cd790ad0ae5..5597c157442 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -38,6 +38,46 @@ void synchronize_irq(unsigned int irq) } EXPORT_SYMBOL(synchronize_irq); +/** + * irq_can_set_affinity - Check if the affinity of a given irq can be set + * @irq: Interrupt to check + * + */ +int irq_can_set_affinity(unsigned int irq) +{ + struct irq_desc *desc = irq_desc + irq; + + if (CHECK_IRQ_PER_CPU(desc->status) || !desc->chip || + !desc->chip->set_affinity) + return 0; + + return 1; +} + +/** + * irq_set_affinity - Set the irq affinity of a given irq + * @irq: Interrupt to set affinity + * @cpumask: cpumask + * + */ +int irq_set_affinity(unsigned int irq, cpumask_t cpumask) +{ + struct irq_desc *desc = irq_desc + irq; + + if (!desc->chip->set_affinity) + return -EINVAL; + + set_balance_irq_affinity(irq, cpumask); + +#ifdef CONFIG_GENERIC_PENDING_IRQ + set_pending_irq(irq, cpumask); +#else + desc->affinity = cpumask; + desc->chip->set_affinity(irq, cpumask); +#endif + return 0; +} + #endif /** |