[PATCH v6 5/9] perf config: Add global variable 'config_set'

[Taeung Song]

The config set is prepared by collecting
all configs from config files (i.e. user config
~/.perfconfig and system config $(sysconfdir)/perfconfig)
so the config set contains all config key-value pairs.

We need to use it as global variable to share it.
And in near future, the variable will be handled in perf_config()
and other functions at util/config.c

Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Jiri Olsa <jo...@redhat.com>
Cc: Masami Hiramatsu <mhira...@kernel.org>
Cc: Alexander Shishkin <alexander.shish...@linux.intel.com>
Signed-off-by: Taeung Song <treeze.tae...@gmail.com>
---
 tools/perf/builtin-config.c | 9 ++++-----
 tools/perf/util/config.c    | 1 +
 tools/perf/util/config.h    | 2 ++
 3 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
index fe1b77f..b3bc01a 100644
--- a/tools/perf/builtin-config.c
+++ b/tools/perf/builtin-config.c
@@ -62,7 +62,6 @@ static int show_config(struct perf_config_set *set)
 int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
 {
        int ret = 0;
-       struct perf_config_set *set;
        char *user_config = mkpath("%s/.perfconfig", getenv("HOME"));
 
        argc = parse_options(argc, argv, config_options, config_usage,
@@ -80,8 +79,8 @@ int cmd_config(int argc, const char **argv, const char 
*prefix __maybe_unused)
        else if (use_user_config)
                config_exclusive_filename = user_config;
 
-       set = perf_config_set__new();
-       if (!set) {
+       config_set = perf_config_set__new();
+       if (!config_set) {
                ret = -1;
                goto out_err;
        }
@@ -92,7 +91,7 @@ int cmd_config(int argc, const char **argv, const char 
*prefix __maybe_unused)
                        pr_err("Error: takes no arguments\n");
                        parse_options_usage(config_usage, config_options, "l", 
1);
                } else {
-                       ret = show_config(set);
+                       ret = show_config(config_set);
                        if (ret < 0) {
                                const char * config_filename = 
config_exclusive_filename;
                                if (!config_exclusive_filename)
@@ -106,7 +105,7 @@ int cmd_config(int argc, const char **argv, const char 
*prefix __maybe_unused)
                usage_with_options(config_usage, config_options);
        }
 
-       perf_config_set__delete(set);
+       perf_config_set__delete(config_set);
 out_err:
        return ret;
 }
diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index 6bfa112..21b7ca8 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -28,6 +28,7 @@ static int config_linenr;
 static int config_file_eof;
 
 const char *config_exclusive_filename;
+struct perf_config_set *config_set;
 
 static int get_next_char(void)
 {
diff --git a/tools/perf/util/config.h b/tools/perf/util/config.h
index 22ec626..ea157a4 100644
--- a/tools/perf/util/config.h
+++ b/tools/perf/util/config.h
@@ -20,6 +20,8 @@ struct perf_config_set {
        struct list_head sections;
 };
 
+extern struct perf_config_set *config_set;
+
 struct perf_config_set *perf_config_set__new(void);
 void perf_config_set__delete(struct perf_config_set *set);
 
-- 
2.5.0