perf hists: Use own hpp_list for hierarchy mode

Now each hists has its own hpp lists in hierarchy.  So instead of having
a pointer to a single perf_hpp_fmt in a hist entry, make it point the
hpp_list for its level.  This will be used to support multiple sort keys
in a single hierarchy level.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1457361308-514-3-git-send-email-namhyung@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
index 3a15e84..95795ef 100644
--- a/tools/perf/ui/hist.c
+++ b/tools/perf/ui/hist.c
@@ -722,6 +722,7 @@
 	struct perf_hpp_list_node *node = NULL;
 	struct perf_hpp_fmt *fmt_copy;
 	bool found = false;
+	bool skip = perf_hpp__should_skip(fmt, hists);
 
 	list_for_each_entry(node, &hists->hpp_formats, list) {
 		if (node->level == fmt->level) {
@@ -735,6 +736,7 @@
 		if (node == NULL)
 			return -1;
 
+		node->skip = skip;
 		node->level = fmt->level;
 		perf_hpp_list__init(&node->hpp);
 
@@ -745,6 +747,9 @@
 	if (fmt_copy == NULL)
 		return -1;
 
+	if (!skip)
+		node->skip = false;
+
 	list_add_tail(&fmt_copy->list, &node->hpp.fields);
 	list_add_tail(&fmt_copy->sort_list, &node->hpp.sorts);