tracing/events: fix compile for modules disabled

Impact: compile fix

The addition of TRACE_EVENT for modules breaks the build for when
modules are disabled. This code fixes that.

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 10 insertions, 2 deletions

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index a4b177720a6c..6591d83e1e7a 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -797,6 +797,7 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events)
              (unsigned long)event < (unsigned long)end;         \
              event++)
 
+#ifdef CONFIG_MODULES
 static void trace_module_add_events(struct module *mod)
 {
         struct ftrace_event_call *call, *start, *end;
@@ -840,8 +841,8 @@ static void trace_module_remove_events(struct module *mod)
         }
 }
 
-int trace_module_notify(struct notifier_block *self,
-                        unsigned long val, void *data)
+static int trace_module_notify(struct notifier_block *self,
+                               unsigned long val, void *data)
 {
         struct module *mod = data;
 
@@ -858,6 +859,13 @@ int trace_module_notify(struct notifier_block *self,
 
         return 0;
 }
+#else
+static int trace_module_notify(struct notifier_block *self,
+                               unsigned long val, void *data)
+{
+        return 0;
+}
+#endif /* CONFIG_MODULES */
 
 struct notifier_block trace_module_nb = {
         .notifier_call = trace_module_notify,