[RFC][PATCH 10/14] function_graph: Have profiler use new helper ftrace_graph_get_ret_stack()

From: "Steven Rostedt (VMware)" The ret_stack processing is going to change, and that is going to break anything that is accessing the ret_stack directly. One user is the function graph profiler. By using the ftrace_graph_get_ret_stack() helper function, the profiler can access the ret_stack

[RFC][PATCH 10/14] function_graph: Have profiler use new helper ftrace_graph_get_ret_stack()

From: "Steven Rostedt (VMware)" The ret_stack processing is going to change, and that is going to break anything that is accessing the ret_stack directly. One user is the function graph profiler. By using the ftrace_graph_get_ret_stack() helper function, the profiler can access the ret_stack