tracing: Remove unnecessary hist trigger struct field

hist_field.var_idx is completely unused, so remove it.

Link: http://lkml.kernel.org/r/d4e066c0f509f5f13ad3babc8c33ca6e7ddc439a.1545161087.git.tom.zanussi@linux.intel.com
Acked-by: Namhyung Kim <namhyung@kernel.org>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 82e72c4..d29bf8a 100644 (file)
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -61,7 +61,6 @@ struct hist_field {
        char                            *system;
        char                            *event_name;
        char                            *name;
-       unsigned int                    var_idx;
        unsigned int                    var_ref_idx;
        bool                            read_once;
 };