CONFIG_BLK_DEV_RNBD (not configurable)

configname: CONFIG_BLK_DEV_RNBD

Linux Kernel Configuration
└─>Device Drivers
└─>Block devices
└─>BLK_DEV_RNBD
In linux kernel since version 5.1 (release Date: 2019-05-05)  
depends
CONFIG_BLK_DEV