perf evsel: Add output_resort_cb method

Add perf_evsel__output_resort_cb() so we have an interface with a
callback for each hist entry. It will be used in the following patch.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190204141808.23031-3-jolsa@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/hist.c

@@ -1775,7 +1775,8 @@ static void output_resort(struct hists *hists, struct ui_progress *prog,
 	}
 }
 
-void perf_evsel__output_resort(struct perf_evsel *evsel, struct ui_progress *prog)
+void perf_evsel__output_resort_cb(struct perf_evsel *evsel, struct ui_progress *prog,
+				  hists__resort_cb_t cb, void *cb_arg)
 {
 	bool use_callchain;
 
@@ -1786,7 +1787,12 @@ void perf_evsel__output_resort(struct perf_evsel *evsel, struct ui_progress *pro
 
 	use_callchain |= symbol_conf.show_branchflag_count;
 
-	output_resort(evsel__hists(evsel), prog, use_callchain, NULL, NULL);
+	output_resort(evsel__hists(evsel), prog, use_callchain, cb, cb_arg);
+}
+
+void perf_evsel__output_resort(struct perf_evsel *evsel, struct ui_progress *prog)
+{
+	return perf_evsel__output_resort_cb(evsel, prog, NULL, NULL);
 }
 
 void hists__output_resort(struct hists *hists, struct ui_progress *prog)

tools/perf/util/hist.h

@@ -165,6 +165,8 @@ void hist_entry__delete(struct hist_entry *he);
 
 typedef int (*hists__resort_cb_t)(struct hist_entry *he, void *arg);
 
+void perf_evsel__output_resort_cb(struct perf_evsel *evsel, struct ui_progress *prog,
+				  hists__resort_cb_t cb, void *cb_arg);
 void perf_evsel__output_resort(struct perf_evsel *evsel, struct ui_progress *prog);
 void hists__output_resort(struct hists *hists, struct ui_progress *prog);
 void hists__output_resort_cb(struct hists *hists, struct ui_progress *prog,