6 * Way to notify the processor an external event has happened
12 * local\\_irq\\_disable
13 * local\\_irq\\_enable
15 * local\\_irq\\_restore
21 * request\\_irq(irq, handler, flags, name, dev)
23 * IRQF\\_SAMPLE\\_RANDOM
24 * free\\_irq(irq, dev)
28 * irqreturn\\_t handler(irq, dev)