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Subject[PATCH] tracing: Skip software disabled event at __synth_event_trace_end()
Date
When the synthetic event is software disabled,
__synth_event_trace_start() does not allocate an event buffer.
In this case __synth_event_trace_end() also should not commit
the buffer.

Check the trace_state->disabled at __synth_event_trace_end()
and if it is disabled, skip it.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
kernel/trace/trace_events_hist.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 483b3fd1094f..781e4b55e117 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -1847,6 +1847,9 @@ __synth_event_trace_start(struct trace_event_file *file,
static inline void
__synth_event_trace_end(struct synth_event_trace_state *trace_state)
{
+ if (trace_state->disabled)
+ return;
+
trace_event_buffer_commit(&trace_state->fbuffer);

ring_buffer_nest_end(trace_state->buffer);
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