From: "Steven Rostedt (Red Hat)" <rost...@goodmis.org>
Currently, only the top level instance can have tracing options.
Signed-off-by: Steven Rostedt <rost...@goodmis.org>
---
kernel/trace/trace.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 944cd02..da9543c 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3968,9 +3968,11 @@ static int tracing_set_tracer(struct trace_array *tr,
const char *buf)
free_snapshot(tr);
}
#endif
- destroy_trace_option_files(topts);
-
- topts = create_trace_option_files(tr, t);
+ /* Currently, only the top instance has options */
+ if (tr->flags & TRACE_ARRAY_FL_GLOBAL) {
+ destroy_trace_option_files(topts);
+ topts = create_trace_option_files(tr, t);
+ }
#ifdef CONFIG_TRACER_MAX_TRACE
if (t->use_max_tr && !had_max_tr) {
--
1.8.5.3
--
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