- entry = debugfs_create_file("format", 0444, call->dir, call,
- &ftrace_event_format_fops);
- if (!entry)
- pr_warning("Could not create debugfs "
- "'%s/format' entry\n", call->name);
+ entry = trace_create_file("format", 0444, call->dir, call,
+ &ftrace_event_format_fops);
+
+ return 0;
+}
+
+#define for_each_event(event, start, end) \
+ for (event = start; \
+ (unsigned long)event < (unsigned long)end; \
+ event++)
+
+static void trace_module_add_events(struct module *mod)
+{
+ struct ftrace_event_call *call, *start, *end;
+ struct dentry *d_events;
+
+ start = mod->trace_events;
+ end = mod->trace_events + mod->num_trace_events;
+
+ if (start == end)
+ return;
+
+ d_events = event_trace_events_dir();
+ if (!d_events)
+ return;
+
+ for_each_event(call, start, end) {
+ /* The linker may leave blanks */
+ if (!call->name)
+ continue;
+ call->mod = mod;
+ list_add(&call->list, &ftrace_events);
+ event_create_dir(call, d_events);
+ }
+}
+
+static void trace_module_remove_events(struct module *mod)
+{
+ struct ftrace_event_call *call, *p;
+
+ list_for_each_entry_safe(call, p, &ftrace_events, list) {
+ if (call->mod == mod) {
+ if (call->enabled) {
+ call->enabled = 0;
+ call->unregfunc();
+ }
+ if (call->event)
+ unregister_ftrace_event(call->event);
+ debugfs_remove_recursive(call->dir);
+ list_del(&call->list);
+ }
+ }
+}
+
+int trace_module_notify(struct notifier_block *self,
+ unsigned long val, void *data)
+{
+ struct module *mod = data;
+
+ mutex_lock(&event_mutex);
+ switch (val) {
+ case MODULE_STATE_COMING:
+ trace_module_add_events(mod);
+ break;
+ case MODULE_STATE_GOING:
+ trace_module_remove_events(mod);
+ break;
+ }
+ mutex_unlock(&event_mutex);