EISA virtual root device

modulename: virtual_root.ko

configname: CONFIG_EISA_VIRTUAL_ROOT

Linux Kernel Configuration
└─>Device Drivers
└─>EISA support
└─>EISA virtual root device
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Activate this option if your system only have EISA bus
(no PCI slots). The Alpha Jensen is an example of such
a system.

When in doubt, say Y.

source code: