centos man page for trace_irq_handler_exit

TRACE_IRQ_HANDLER_EX(9) 						IRQ						   TRACE_IRQ_HANDLER_EX(9)

NAME
       trace_irq_handler_exit - called immediately after the irq action handler returns

SYNOPSIS
       void trace_irq_handler_exit(int irq, struct irqaction * action, int ret);

ARGUMENTS
       irq
	   irq number

       action
	   pointer to struct irqaction

       ret
	   return value

DESCRIPTION
       If the ret value is set to IRQ_HANDLED, then we know that the corresponding action->handler scuccessully handled this irq. Otherwise, the
       irq might be a shared irq line, or the irq was not handled successfully. Can be used in conjunction with the irq_handler_entry to
       understand irq handler latencies.

AUTHORS
       Jason Baron <jbaron@redhat.com>
	   Author.

       William Cohen <wcohen@redhat.com>
	   Author.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   TRACE_IRQ_HANDLER_EX(9)