1 files changed, 16 insertions, 0 deletions

diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 169b3c44ee97..28f2602435d0 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -182,6 +182,22 @@ ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth,
         return 0;
 }
 
+int function_graph_enter(unsigned long ret, unsigned long func,
+                         unsigned long frame_pointer, unsigned long *retp)
+{
+        struct ftrace_graph_ent trace;
+
+        trace.func = func;
+        trace.depth = current->curr_ret_stack + 1;
+
+        /* Only trace if the calling function expects to */
+        if (!ftrace_graph_entry(&trace))
+                return -EBUSY;
+
+        return ftrace_push_return_trace(ret, func, &trace.depth,
+                                        frame_pointer, retp);
+}
+
 /* Retrieve a function return address to the trace stack on thread info.*/
 static void
 ftrace_pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret,