perf tools: Remove nr_sort_keys field

The nr_sort_keys field is to carry the number of sort entries in a
hpp_list or hists to determine the depth of indentation of a hist entry.
As it's only used in hierarchy mode and now we have used nr_hpp_node for
this reason, there's no need to keep it anymore.  Let's get rid of it.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1457531222-18130-7-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/ui/hist.c

@@ -515,9 +515,6 @@ void perf_hpp_list__column_register(struct perf_hpp_list *list,
 void perf_hpp_list__register_sort_field(struct perf_hpp_list *list,
 					struct perf_hpp_fmt *format)
 {
-	if (perf_hpp__is_sort_entry(format) || perf_hpp__is_dynamic_entry(format))
-		list->nr_sort_keys++;
-
 	list_add_tail(&format->sort_list, &list->sorts);
 }
 

tools/perf/util/hist.h

@@ -79,7 +79,6 @@ struct hists {
 	int			socket_filter;
 	struct perf_hpp_list	*hpp_list;
 	struct list_head	hpp_formats;
-	int			nr_sort_keys;
 	int			nr_hpp_node;
 };
 
@@ -241,7 +240,6 @@ struct perf_hpp_fmt {
 struct perf_hpp_list {
 	struct list_head fields;
 	struct list_head sorts;
-	int nr_sort_keys;
 };
 
 extern struct perf_hpp_list perf_hpp_list;

tools/perf/util/sort.c

@@ -2703,29 +2703,6 @@ out:
 	return ret;
 }
 
-static void evlist__set_hists_nr_sort_keys(struct perf_evlist *evlist)
-{
-	struct perf_evsel *evsel;
-
-	evlist__for_each(evlist, evsel) {
-		struct perf_hpp_fmt *fmt;
-		struct hists *hists = evsel__hists(evsel);
-
-		hists->nr_sort_keys = perf_hpp_list.nr_sort_keys;
-
-		/*
-		 * If dynamic entries were used, it might add multiple
-		 * entries to each evsel for a single field name.  Set
-		 * actual number of sort keys for each hists.
-		 */
-		perf_hpp_list__for_each_sort_list(&perf_hpp_list, fmt) {
-			if (perf_hpp__is_dynamic_entry(fmt) &&
-			    !perf_hpp__defined_dynamic_entry(fmt, hists))
-				hists->nr_sort_keys--;
-		}
-	}
-}
-
 int setup_sorting(struct perf_evlist *evlist)
 {
 	int err;
@@ -2740,9 +2717,6 @@ int setup_sorting(struct perf_evlist *evlist)
 			return err;
 	}
 
-	if (evlist != NULL)
-		evlist__set_hists_nr_sort_keys(evlist);
-
 	reset_dimensions();
 
 	/*