synchronize_hardirq — wait for pending hard IRQ handlers (on other CPUs)
|unsigned int irq|
This function waits for any pending hard IRQ handlers for this interrupt to complete before returning. If you use this function while holding a resource the IRQ handler may need you will deadlock. It does not take associated threaded handlers into account.
Do not use this for shutdown scenarios where you must be sure that all parts (hardirq and threaded handler) have completed.