[PATCH v5 1/2] tracing: Fix a compilation error without CONFIG_MODULES

[Masami Hiramatsu (Google)]

From: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>

There are some code which depends on CONFIG_MODULES. #ifdef
to enclose it.

Fixes: dca91c1c5468 ("tracing: Have persistent trace instances save module addresses")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
---
 Changes in v5:
   - Make a nop save_mod() if CONFIG_MODULES=n instead of
     adding #ifdefs around module_for_each_mod().
---
 kernel/trace/trace.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index c3c79908766e..68abea81e51a 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -6001,6 +6001,7 @@ struct trace_scratch {
 
 static DEFINE_MUTEX(scratch_mutex);
 
+#ifdef CONFIG_MODULES
 static int save_mod(struct module *mod, void *data)
 {
 	struct trace_array *tr = data;
@@ -6025,6 +6026,12 @@ static int save_mod(struct module *mod, void *data)
 
 	return 0;
 }
+#else
+static int save_mod(struct module *mod, void *data)
+{
+	return 0;
+}
+#endif
 
 static void update_last_data(struct trace_array *tr)
 {