tracing: Use hist trigger's var_ref array to destroy var_refs
Since every var ref for a trigger has an entry in the var_ref[] array, use that to destroy the var_refs, instead of piecemeal via the field expressions. This allows us to avoid having to keep and treat differently separate lists for the action-related references, which future patches will remove. Link: http://lkml.kernel.org/r/fad1a164f0e257c158e70d6eadbf6c586e04b2a2.1545161087.git.tom.zanussi@linux.intel.comAcked-by: NNamhyung Kim <namhyung@kernel.org> Reviewed-by: NMasami Hiramatsu <mhiramat@kernel.org> Signed-off-by: NTom Zanussi <tom.zanussi@linux.intel.com> Signed-off-by: NSteven Rostedt (VMware) <rostedt@goodmis.org>
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