tracing: convert irq events to use __print_symbolic
The recording of the names at trace time is inefficient. This patch implements the softirq event recording to only record the vector and then use the __print_symbolic interface to print out the names. [ Impact: faster recording of softirq events ] Signed-off-by: NSteven Rostedt <rostedt@goodmis.org> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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