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perf: Optimize perf_tp_event_match()
Since we know tracepoints come from kernel context, avoid conditionals that try and establish that very fact. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <20100521090710.904944001@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -4496,7 +4496,10 @@ static int perf_tp_event_match(struct perf_event *event,
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struct perf_sample_data *data,
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struct pt_regs *regs)
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{
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if (perf_exclude_event(event, regs))
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/*
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* All tracepoints are from kernel-space.
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*/
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if (event->attr.exclude_kernel)
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return 0;
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if (!perf_tp_filter_match(event, data))
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