linux-kernel - [PATCH 01/19] perf ftrace: trace system wide if no target is given

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Date:   Sun, 10 May 2020 23:06:10 +0800
From:   Changbin Du <changbin.du@...il.com>
To:     Jiri Olsa <jolsa@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-kernel@...r.kernel.org, Changbin Du <changbin.du@...il.com>
Subject: [PATCH 01/19] perf ftrace: trace system wide if no target is given

This align ftrace to other perf sub-commands that if no target specified
then we trace all functions.

Signed-off-by: Changbin Du <changbin.du@...il.com>
---
 tools/perf/builtin-ftrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index d5adc417a4ca..11fc02037899 100644
--- a/tools/perf/builtin-ftrace.c
+++ b/tools/perf/builtin-ftrace.c
@@ -493,7 +493,7 @@ int cmd_ftrace(int argc, const char **argv)
 	argc = parse_options(argc, argv, ftrace_options, ftrace_usage,
 			    PARSE_OPT_STOP_AT_NON_OPTION);
 	if (!argc && target__none(&ftrace.target))
-		usage_with_options(ftrace_usage, ftrace_options);
+		ftrace.target.system_wide = true;
 
 	ret = target__validate(&ftrace.target);
 	if (ret) {
-- 
2.25.1