Currently the trace buffer read functions use a static variable
"old_tracer" for detecting if the current tracer changes. This
was suitable for a single trace file ("trace"), but to add a
snapshot feature that will use the same function for its file,
a check against a static variable is not
Currently the trace buffer read functions use a static variable
old_tracer for detecting if the current tracer changes. This
was suitable for a single trace file (trace), but to add a
snapshot feature that will use the same function for its file,
a check against a static variable is not
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