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perf, trace: Remove superfluous rcu_read_lock()
__DO_TRACE() already calls the callbacks under rcu_read_lock_sched(), which is sufficient for our needs, avoid doing it again. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -4613,12 +4613,10 @@ void perf_tp_event(u64 addr, u64 count, void *record, int entry_size,
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perf_sample_data_init(&data, addr);
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data.raw = &raw;
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rcu_read_lock();
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hlist_for_each_entry_rcu(event, node, head, hlist_entry) {
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if (perf_tp_event_match(event, &data, regs))
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perf_swevent_add(event, count, 1, &data, regs);
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}
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rcu_read_unlock();
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perf_swevent_put_recursion_context(rctx);
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}
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