centos man page for enable_irq

ENABLE_IRQ(9)						     Public Functions Provided						     ENABLE_IRQ(9)

NAME
       enable_irq - enable handling of an irq

SYNOPSIS
       void enable_irq(unsigned int irq);

ARGUMENTS
       irq
	   Interrupt to enable

DESCRIPTION
       Undoes the effect of one call to disable_irq. If this matches the last disable, processing of interrupts on this IRQ line is re-enabled.

       This function may be called from IRQ context only when desc->irq_data.chip->bus_lock and desc->chip->bus_sync_unlock are NULL !

AUTHORS
       Thomas Gleixner <tglx@linutronix.de>
	   Author.

       Ingo Molnar <mingo@elte.hu>
	   Author.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							     ENABLE_IRQ(9)