perf_counter tools: Add 'perf list' to list available events

perf list: List all the available event types which can be used in
-e (--event) options.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 5 deletions

diff --git a/Documentation/perf_counter/builtin-record.c b/Documentation/perf_counter/builtin-record.c
index 130fd88266b..aeab9c4b15e 100644
--- a/Documentation/perf_counter/builtin-record.c
+++ b/Documentation/perf_counter/builtin-record.c
@@ -495,11 +495,10 @@ static const char * const record_usage[] = {
         NULL
 };
 
-static char events_help_msg[EVENTS_HELP_MAX];
-
 static const struct option options[] = {
         OPT_CALLBACK('e', "event", NULL, "event",
-                     events_help_msg, parse_events),
+                     "event selector. use 'perf list' to list available events",
+                     parse_events),
         OPT_INTEGER('p', "pid", &target_pid,
                     "record events on existing pid"),
         OPT_INTEGER('r', "realtime", &realtime_prio,
@@ -527,8 +526,6 @@ int cmd_record(int argc, const char **argv, const char *prefix)
 {
         int counter;
 
-        create_events_help(events_help_msg);
-
         argc = parse_options(argc, argv, options, record_usage, 0);
         if (!argc && target_pid == -1 && !system_wide)
                 usage_with_options(record_usage, options);