diff options
| author | Hyeonggon Yoo <42.hyeyoo@gmail.com> | 2021-05-29 15:14:23 +0900 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-06-10 11:16:20 -0400 |
| commit | 6c610dba6e2beb1a16ac309672181d0090fb8d30 (patch) | |
| tree | f977b64b327e2a5d1c03a487ae332f37a35936ae /kernel/trace/trace_events_hist.c | |
| parent | 099dcc1801d981260aee9496dbeb55270dca70c1 (diff) | |
tracing: Add WARN_ON_ONCE when returned value is negative
ret is assigned return value of event_hist_trigger_func, but the value
is unused. It is better to warn when returned value is negative,
rather than just ignoring it.
Link: https://lkml.kernel.org/r/20210529061423.GA103954@hyeyoo
Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_events_hist.c')
| -rw-r--r-- | kernel/trace/trace_events_hist.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index dacd6fe0f60c..ba03b7d84fc2 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -5232,6 +5232,7 @@ static void unregister_field_var_hists(struct hist_trigger_data *hist_data) cmd = hist_data->field_var_hists[i]->cmd; ret = event_hist_trigger_func(&trigger_hist_cmd, file, "!hist", "hist", cmd); + WARN_ON_ONCE(ret < 0); } } |