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Subject[tip:perf/core] perf evsel: Set leader evsel's ->leader to itself
Commit-ID:  2cfda562da7b0b1e0575507ef3efe782d4e218e4
Gitweb: http://git.kernel.org/tip/2cfda562da7b0b1e0575507ef3efe782d4e218e4
Author: Namhyung Kim <namhyung.kim@lge.com>
AuthorDate: Thu, 29 Nov 2012 15:38:29 +0900
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Sun, 9 Dec 2012 08:46:06 -0300

perf evsel: Set leader evsel's ->leader to itself

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@ghostprotocols.net>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1354171126-14387-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
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 */

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