SYNOPSIS
- void trace_irq_handler_entry(int irq, struct irqaction * action);
ARGUMENTS
irq
-
- irq number
action
- pointer to struct irqaction
DESCRIPTION
The struct irqaction pointed to by action contains various information about the handler, including the device name, action->name, and the device id, action->dev_id. When used in conjunction with the irq_handler_exit tracepoint, we can figure out irq handler latencies.
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