CONFIG_FS_STACK (not configurable)

modulename: backing-file.ko

configname: CONFIG_FS_STACK

Linux Kernel Configuration
└─>File systems
└─>FS_STACK
In linux kernel since version 4.19.310 (release Date: 2024-03-15)  
source code:
fs/backing-file.c
is depended by
CONFIG_FUSE_PASSTHROUGH