tools lib traceevent: Add const qualifier to string arguments

If pevent_register_event_handler() received a string literal as
@sys_name or @event_name parameter, it emitted a warning about const
qualifier removal.  Since they're not modified in the function we can
make it have const qualifier.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1370323231-14022-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 82b0606dcb8a..d1c2a6a4cd32 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -5450,10 +5450,9 @@ int pevent_register_print_function(struct pevent *pevent,
  * If @id is >= 0, then it is used to find the event.
  * else @sys_name and @event_name are used.
  */
-int pevent_register_event_handler(struct pevent *pevent,
-                                  int id, char *sys_name, char *event_name,
-                                  pevent_event_handler_func func,
-                                  void *context)
+int pevent_register_event_handler(struct pevent *pevent, int id,
+                                  const char *sys_name, const char *event_name,
+                                  pevent_event_handler_func func, void *context)
 {
         struct event_format *event;
         struct event_handler *handle;