1TRACE_IRQ_HANDLER_EN(9)               IRQ              TRACE_IRQ_HANDLER_EN(9)
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NAME

6       trace_irq_handler_entry - called immediately before the irq action
7       handler
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SYNOPSIS

10       void trace_irq_handler_entry(int irq, struct irqaction * action);
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ARGUMENTS

13       irq
14           irq number
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16       action
17           pointer to struct irqaction
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DESCRIPTION

20       The struct irqaction pointed to by action contains various information
21       about the handler, including the device name, action->name, and the
22       device id, action->dev_id. When used in conjunction with the
23       irq_handler_exit tracepoint, we can figure out irq handler latencies.
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AUTHORS

26       Jason Baron <jbaron@redhat.com>
27           Author.
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29       William Cohen <wcohen@redhat.com>
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33Kernel Hackers Manual 2.6.       November 2011         TRACE_IRQ_HANDLER_EN(9)
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