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 AT redhat.com>
           Author.

       William Cohen <wcohen AT redhat.com>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   TRACE_IRQ_HANDLER_EX(9)