linux-kernel - [PATCH 07/18] perf metric: Add add

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Date:   Sun, 12 Jul 2020 15:26:23 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        John Garry <john.garry@...wei.com>,
        "Paul A. Clarke" <pc@...ibm.com>,
        Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH 07/18] perf metric: Add add_metric function

Decouple metric adding login into add_metric function,
so it can be used from other places in following changes.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/util/metricgroup.c | 42 ++++++++++++++++++++++-------------
 1 file changed, 26 insertions(+), 16 deletions(-)

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 72552608ff7d..9a168f3df7a4 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -634,18 +634,11 @@ static struct pmu_event *find_metric(const char *metric, struct pmu_events_map *
 	return NULL;
 }
 
-static int metricgroup__add_metric(const char *metric, bool metric_no_group,
-				   struct strbuf *events,
-				   struct list_head *group_list,
-				   struct pmu_events_map *map)
+static int add_metric(struct list_head *group_list,
+		      struct pmu_event *pe,
+		      bool metric_no_group)
 {
-	struct pmu_event *pe;
-	struct egroup *eg;
-	int ret;
-
-	pe = find_metric(metric, map);
-	if (!pe)
-		return -EINVAL;
+	int ret = 0;
 
 	pr_debug("metric expr %s for %s\n", pe->metric_expr, pe->metric_name);
 
@@ -654,8 +647,6 @@ static int metricgroup__add_metric(const char *metric, bool metric_no_group,
 						pe,
 						metric_no_group,
 						1);
-		if (ret)
-			return ret;
 	} else {
 		int j, count;
 
@@ -666,14 +657,33 @@ static int metricgroup__add_metric(const char *metric, bool metric_no_group,
 		 * those events to group_list.
 		 */
 
-		for (j = 0; j < count; j++) {
+		for (j = 0; j < count && !ret; j++) {
 			ret = __metricgroup__add_metric(
 				group_list, pe,
 				metric_no_group, j);
-			if (ret)
-				return ret;
 		}
 	}
+
+	return ret;
+}
+
+static int metricgroup__add_metric(const char *metric, bool metric_no_group,
+				   struct strbuf *events,
+				   struct list_head *group_list,
+				   struct pmu_events_map *map)
+{
+	struct pmu_event *pe;
+	struct egroup *eg;
+	int ret;
+
+	pe = find_metric(metric, map);
+	if (!pe)
+		return -EINVAL;
+
+	ret = add_metric(group_list, pe, metric_no_group);
+	if (ret)
+		return ret;
+
 	list_for_each_entry(eg, group_list, nd) {
 		if (events->len > 0)
 			strbuf_addf(events, ",");
-- 
2.25.4