CONFIG_FB_DEFERRED_IO (not configurable)

configname: CONFIG_FB_DEFERRED_IO

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Frame buffer Devices
└─>FB_DEFERRED_IO
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  

is selected by
CONFIG_FB_HECUBA