Interrupt Handling

synchronize_irq — wait for pending IRQ handlers (on other CPUs)
disable_irq_nosync — disable an irq without waiting
disable_irq — disable an irq and wait for completion
enable_irq — enable handling of an irq
set_irq_wake — control irq power management wakeup
free_irq — free an interrupt
request_irq — allocate an interrupt line