[PATCH] ftrace: use helper function clear_ftrace_function

[Yisheng Xie]

We have helper function clear_ftrace_function(), use it instead of hard
code. And this should not have any functional change.

Signed-off-by: Yisheng Xie <xieyisheng1@xxxxxxxxxx>
---
 kernel/trace/ftrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 554b517..ba78e03 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -6779,7 +6779,7 @@ int unregister_ftrace_function(struct ftrace_ops *ops)
 
 	} else {
 		/* stopping ftrace calls (just send to ftrace_stub) */
-		ftrace_trace_function = ftrace_stub;
+		clear_ftrace_function();
 
 		ftrace_shutdown_sysctl();
 	}
-- 
1.7.12.4