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tracing: Remove ftrace_stop/start() from reading the trace file
Disabling reading and writing to the trace file should not be able to disable all function tracing callbacks. There's other users today (like kprobes and perf). Reading a trace file should not stop those from happening. Cc: stable@vger.kernel.org # 3.0+ Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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@ -1396,7 +1396,6 @@ void tracing_start(void)
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arch_spin_unlock(&global_trace.max_lock);
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ftrace_start();
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out:
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raw_spin_unlock_irqrestore(&global_trace.start_lock, flags);
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}
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@ -1443,7 +1442,6 @@ void tracing_stop(void)
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struct ring_buffer *buffer;
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unsigned long flags;
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ftrace_stop();
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raw_spin_lock_irqsave(&global_trace.start_lock, flags);
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if (global_trace.stop_count++)
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goto out;
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