CONFIG_RETHOOK (not configurable)

modulename: rethook.ko

configname: CONFIG_RETHOOK

Linux Kernel Configuration
└─>Kernel hacking
└─>RETHOOK
In linux kernel since version 5.2 (release Date: 2019-07-07)  
Enable generic return hooking feature. This is an internal
API, which will be used by other function-entry hooking
features like fprobe and kprobes.

source code:
kernel/trace/rethook.c