linux-kernel - [PATCH 2/2] perf record: Avoid duplicate call of perf_default

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Date:   Mon, 12 Mar 2018 19:25:57 +0800
From:   Yisheng Xie <xieyisheng1@...wei.com>
To:     <acme@...nel.org>
CC:     <jolsa@...hat.com>, <namhyung@...nel.org>,
        <alexander.shishkin@...ux.intel.com>, <mingo@...hat.com>,
        <peterz@...radead.org>, <linux-kernel@...r.kernel.org>,
        Yisheng Xie <xieyisheng1@...wei.com>
Subject: [PATCH 2/2] perf record: Avoid duplicate call of perf_default_config()

We have brought perf_default_config to the very beginning at main(), so
it no need to call perf_default_config() once more for most of config in
perf-record but only for record.call-graph.

Signed-off-by: Yisheng Xie <xieyisheng1@...wei.com>
---
 tools/perf/builtin-record.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index a217623..811cfc1 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1260,10 +1260,12 @@ static int perf_record_config(const char *var, const char *value, void *cb)
 			return -1;
 		return 0;
 	}
-	if (!strcmp(var, "record.call-graph"))
-		var = "call-graph.record-mode"; /* fall-through */
+	if (!strcmp(var, "record.call-graph")) {
+		var = "call-graph.record-mode";
+		return perf_default_config(var, value, cb);
+	}
 
-	return perf_default_config(var, value, cb);
+	return 0;
 }
 
 struct clockid_map {
-- 
1.7.12.4