perf hists: Introduce struct he_stat

The struct he_stat is for separating out statistics data of a hist
entry.  It is required for later changes.

It's just a mechanical change and should have no functional differences.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arun Sharma <asharma@fb.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1349354994-17853-8-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index d359795..0568536 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -570,7 +570,7 @@
 					     struct hist_entry *he)	\
 {									\
 	struct hists *hists = he->hists;				\
-	double percent = 100.0 * he->_field / hists->stats.total_period;\
+	double percent = 100.0 * he->stat._field / hists->stats.total_period; \
 	*(double *)hpp->ptr = percent;					\
 	return scnprintf(hpp->buf, hpp->size, "%6.2f%%", percent);	\
 }
@@ -982,7 +982,7 @@
 		folded_sign = hist_entry__folded(he);
 
 	hist_entry__sort_snprintf(he, s, sizeof(s), browser->hists);
-	percent = (he->period * 100.0) / browser->hists->stats.total_period;
+	percent = (he->stat.period * 100.0) / browser->hists->stats.total_period;
 
 	if (symbol_conf.use_callchain)
 		printed += fprintf(fp, "%c ", folded_sign);
@@ -990,10 +990,10 @@
 	printed += fprintf(fp, " %5.2f%%", percent);
 
 	if (symbol_conf.show_nr_samples)
-		printed += fprintf(fp, " %11u", he->nr_events);
+		printed += fprintf(fp, " %11u", he->stat.nr_events);
 
 	if (symbol_conf.show_total_period)
-		printed += fprintf(fp, " %12" PRIu64, he->period);
+		printed += fprintf(fp, " %12" PRIu64, he->stat.period);
 
 	printed += fprintf(fp, "%s\n", rtrim(s));