FTRACE_OPS_FL_PID
dst_ops->flags = FTRACE_OPS_FL_PID | FTRACE_OPS_GRAPH_STUB;
if (op->flags & FTRACE_OPS_FL_PID) {
if (!(ops->flags & FTRACE_OPS_FL_PID) || !ops->private)
FTRACE_OPS_FL_PID,
if (op->flags & FTRACE_OPS_FL_PID) {
FTRACE_OPS_FL_PID,
ops->flags = FTRACE_OPS_FL_PID;