[tip:perf/core] perf evsel: Centralize perf_sample initialization

[tip-bot for Jiri Olsa <tipbot@zytor.com>]

Commit-ID:  3ad31d8a0df257c3f18c989119359c1f25cd009d
Gitweb:     https://git.kernel.org/tip/3ad31d8a0df257c3f18c989119359c1f25cd009d
Author:     Jiri Olsa <jolsa@kernel.org>
AuthorDate: Thu, 3 Aug 2017 16:07:05 +0200
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 16 Nov 2017 14:50:08 -0300

perf evsel: Centralize perf_sample initialization

Move the initialization bits into common place at the beginning of the
function.

Also removing some superfluous zero initialization for addr and
transaction, because we zero all the data at the top.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-1gv5t6fvv735t1rt3mxpy1h9@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/evsel.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index b8e9def..03d7abc 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1983,6 +1983,8 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
 	data->stream_id = data->id = data->time = -1ULL;
 	data->period = evsel->attr.sample_period;
 	data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+	data->id = -1ULL;
+	data->data_src = PERF_MEM_DATA_SRC_NONE;
 
 	if (event->header.type != PERF_RECORD_SAMPLE) {
 		if (!evsel->attr.sample_id_all)
@@ -2000,7 +2002,6 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
 	if (evsel->sample_size + sizeof(event->header) > event->header.size)
 		return -EFAULT;
 
-	data->id = -1ULL;
 	if (type & PERF_SAMPLE_IDENTIFIER) {
 		data->id = *array;
 		array++;
@@ -2030,7 +2031,6 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
 		array++;
 	}
 
-	data->addr = 0;
 	if (type & PERF_SAMPLE_ADDR) {
 		data->addr = *array;
 		array++;
@@ -2194,14 +2194,12 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
 		array++;
 	}
 
-	data->data_src = PERF_MEM_DATA_SRC_NONE;
 	if (type & PERF_SAMPLE_DATA_SRC) {
 		OVERFLOW_CHECK_u64(array);
 		data->data_src = *array;
 		array++;
 	}
 
-	data->transaction = 0;
 	if (type & PERF_SAMPLE_TRANSACTION) {
 		OVERFLOW_CHECK_u64(array);
 		data->transaction = *array;