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tracing: Only let top level have option files 

Currently, only the top level instance can have tracing options.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
hifive-unleashed-5.1
Steven Rostedt (Red Hat) 2014-01-14 12:33:33 -05:00 committed by Steven Rostedt
parent 607e2ea167
commit f1b21c9a40
1 changed files with 5 additions and 3 deletions
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8
kernel/trace/trace.c
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@ -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) {