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36  * the function graph tracing. This function is called by the critical
37  * paths of function graph to keep those paths from doing any more harm.
45  * ftrace_graph_stop - set to permanently disable function graph tracincg
47  * In case of an error int function graph tracing, this is called
48  * to try to keep function graph tracing from causing any more harm.
119 	 * Skip graph tracing if the return location is served by direct trampoline,  in function_graph_enter()
168 	 * the function graph trace will fail. This test detects this  in ftrace_pop_return_trace()
264  * call graph at @idx starting with zero. If @idx is zero, it
285  * return address ('ret') to its original value, in case the function graph
456  * The function graph tracer should only trace the functions defined
458  * tracer ops is registered, the graph tracer requires testing the
468 	 * The graph and global ops share the same set of functions  in update_function_graph_func()
470 	 * the graph tracing needs to test if its the function  in update_function_graph_func()