[PATCH v5 8/9] perf config: Reset the config set at only 'config' sub-command

From: Taeung Song
Date: Tue May 31 2016 - 13:27:50 EST

When first calling perf_config(), the config set is
initialized collecting both user and system config files
(i.e. user config ~/.perfconfig and system config
$(sysconfdir)/perfconfig) so config set contains
not only user config but also system config key-value pairs.
(User config has higher priority than system config.)

But 'config' sub-command individually use the config set
so free the existing config set (i.e. a global variable config_set)
before reinstantiating it.

And 'config' sub-command have '--user' or '--system' options.
To reinitialize with the options, the config set should be reset
at the very beginning at cmd_config()

Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Signed-off-by: Taeung Song <treeze.taeung@xxxxxxxxx>
tools/perf/builtin-config.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
index f23fe52..4dab41e 100644
--- a/tools/perf/builtin-config.c
+++ b/tools/perf/builtin-config.c
@@ -79,6 +79,11 @@ int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
else if (use_user_config)
config_exclusive_filename = user_config;

+ /*
+ * Reset the config set at only 'config' sub-command
+ * because of reinitializing with options config file location.
+ */
+ perf_config_set__delete(&config_set);
config_set = perf_config_set__new();
if (!config_set) {
ret = -1;