[PATCH 13/37] perf evsel: Set leader evsel's ->leader to itself

[Arnaldo Carvalho de Melo]

From: Namhyung Kim <namhyung.kim@xxxxxxx>

Currently only non-leader members are set ->leader to the leader evsel
of the group and the leader has set NULL.  Thus it requires special
casing for leader evsels.  Set ->leader to itself will remove this.

Suggested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1354171126-14387-3-git-send-email-namhyung@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/evlist.c |    1 -
 tools/perf/util/evsel.c  |    1 +
 tools/perf/util/evsel.h  |    2 +-
 3 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 7052934..90db2a1 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -111,7 +111,6 @@ void __perf_evlist__set_leader(struct list_head *list)
 	struct perf_evsel *evsel, *leader;
 
 	leader = list_entry(list->next, struct perf_evsel, node);
-	leader->leader = NULL;
 
 	list_for_each_entry(evsel, list, node) {
 		if (evsel != leader)
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 1b16dd1..7e93418 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -55,6 +55,7 @@ void perf_evsel__init(struct perf_evsel *evsel,
 {
 	evsel->idx	   = idx;
 	evsel->attr	   = *attr;
+	evsel->leader	   = evsel;
 	INIT_LIST_HEAD(&evsel->node);
 	hists__init(&evsel->hists);
 	evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 3d2b801..cbf6d97 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -228,6 +228,6 @@ static inline struct perf_evsel *perf_evsel__next(struct perf_evsel *evsel)
 
 static inline bool perf_evsel__is_group_member(const struct perf_evsel *evsel)
 {
-	return evsel->leader != NULL;
+	return evsel->leader != evsel;
 }
 #endif /* __PERF_EVSEL_H */
-- 
1.7.9.2.358.g22243

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