trace_irq_handler_exit (9) Linux Manual Page
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 successfully 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.