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tracing: Add WARN_ON_ONCE when returned value is negative
[linux-2.6-microblaze.git]
/
kernel
/
trace
/
trace_events_hist.c
diff --git
a/kernel/trace/trace_events_hist.c
b/kernel/trace/trace_events_hist.c
index
dacd6fe
..
ba03b7d
100644
(file)
--- 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);
}
}