tracing: A minor cleanup for create_system_filter()

The first two parameters should be reduced to one, as @tr is simply
@dir->tr.

Link: https://lkml.kernel.org/r/20210324205642.65e03248@oasis.local.home
Link: https://lkml.kernel.org/r/20210325163752.128407-1-hqjagain@gmail.com
Suggested-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 49de3e2..c2dd697 100644 (file)
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -1750,7 +1750,6 @@ int create_event_filter(struct trace_array *tr,
  * and always remembers @filter_str.
  */
 static int create_system_filter(struct trace_subsystem_dir *dir,
-                               struct trace_array *tr,
                                char *filter_str, struct event_filter **filterp)
 {
        struct filter_parse_error *pe = NULL;
@@ -1758,13 +1757,13 @@ static int create_system_filter(struct trace_subsystem_dir *dir,
 
        err = create_filter_start(filter_str, true, &pe, filterp);
        if (!err) {
-               err = process_system_preds(dir, tr, pe, filter_str);
+               err = process_system_preds(dir, dir->tr, pe, filter_str);
                if (!err) {
                        /* System filters just show a default message */
                        kfree((*filterp)->filter_string);
                        (*filterp)->filter_string = NULL;
                } else {
-                       append_filter_err(tr, pe, *filterp);
+                       append_filter_err(dir->tr, pe, *filterp);
                }
        }
        create_filter_finish(pe);
@@ -1852,7 +1851,7 @@ int apply_subsystem_event_filter(struct trace_subsystem_dir *dir,
                goto out_unlock;
        }
 
-       err = create_system_filter(dir, tr, filter_string, &filter);
+       err = create_system_filter(dir, filter_string, &filter);
        if (filter) {
                /*
                 * No event actually uses the system filter