perf tools: Add a global variable "const char *input_name"

Currently many perf commands annotate/evlist/report/script/lock etc all
support "-i" option to chose a specific perf data, and all of them
create a local "input_name" to save the file name for that perf data.

Since most of these commands need it, we can add a global variable for
it, also it can some other benefits:

1. When calling script browser inside hists/annotation browser, it needs
to know the perf data file name to run that script.

2. For further feature like runtime switching to another perf data file,
this variable can also help.

Signed-off-by: Feng Tang <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

1 files changed, 2 insertions, 3 deletions

diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index f251b613b2f3..ab4cf232b852 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -965,7 +965,7 @@ static void write_svg_file(const char *filename)
 	svg_close();
 }
 
-static int __cmd_timechart(const char *input_name, const char *output_name)
+static int __cmd_timechart(const char *output_name)
 {
 	struct perf_tool perf_timechart = {
 		.comm		 = process_comm_event,
@@ -1061,7 +1061,6 @@ parse_process(const struct option *opt __maybe_unused, const char *arg,
 int cmd_timechart(int argc, const char **argv,
 		  const char *prefix __maybe_unused)
 {
-	const char *input_name;
 	const char *output_name = "output.svg";
 	const struct option options[] = {
 	OPT_STRING('i', "input", &input_name, "file", "input file name"),
@@ -1092,5 +1091,5 @@ int cmd_timechart(int argc, const char **argv,
 
 	setup_pager();
 
-	return __cmd_timechart(input_name, output_name);
+	return __cmd_timechart(output_name);
 }