linux-kernel - [PATCH 1/2] perf tools: Drop strdup in get_filename_for_perf

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Message-Id: <1122029b8eed159852fe6669827b6dff12f81698.1386783950.git.yangds.fnst@cn.fujitsu.com>
Date:	Wed, 11 Dec 2013 12:47:37 -0500
From:	Dongsheng Yang <yangds.fnst@...fujitsu.com>
To:	acme@...stprotocols.net, dsahern@...il.com
Cc:	linux-kernel@...r.kernel.org,
	Dongsheng Yang <yangds.fnst@...fujitsu.com>
Subject: [PATCH 1/2] perf tools: Drop strdup in get_filename_for_perf_kvm().

As we need a const char * as a result of get_filename_for_perf_kvm(),
There is no need to use strdup() for the return value.

This patch drop the strdup() to save memory in get_filename_for_perf_kvm().

Signed-off-by: Dongsheng Yang <yangds.fnst@...fujitsu.com>
---
 tools/perf/builtin-kvm.c | 8 +-------
 tools/perf/util/util.c   | 6 +++---
 2 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index c6fa3cb..03bd946 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -1712,15 +1712,9 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
 	if (!perf_host)
 		perf_guest = 1;
 
-	if (!file_name) {
+	if (!file_name)
 		file_name = get_filename_for_perf_kvm();
 
-		if (!file_name) {
-			pr_err("Failed to allocate memory for filename\n");
-			return -ENOMEM;
-		}
-	}
-
 	if (!strncmp(argv[0], "rec", 3))
 		return __cmd_record(file_name, argc, argv);
 	else if (!strncmp(argv[0], "rep", 3))
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 4a57609..e9cb136 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -488,11 +488,11 @@ const char *get_filename_for_perf_kvm(void)
 	const char *filename;
 
 	if (perf_host && !perf_guest)
-		filename = strdup("perf.data.host");
+		filename = "perf.data.host";
 	else if (!perf_host && perf_guest)
-		filename = strdup("perf.data.guest");
+		filename = "perf.data.guest";
 	else
-		filename = strdup("perf.data.kvm");
+		filename = "perf.data.kvm";
 
 	return filename;
 }
-- 
1.8.2.1

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