CONFIG_HAVE_FTRACE_GRAPH_FUNC (not configurable)
configname: CONFIG_HAVE_FTRACE_GRAPH_FUNC
Linux Kernel Configuration
└─>Kernel hacking
└─>HAVE_FTRACE_GRAPH_FUNC
In linux kernel since version 6.6.78 (release Date: 2025-02-17)
True if ftrace_graph_func() is defined.