CONFIG_FB_CFB_FILLRECT (not configurable)

modulename: cfbfillrect.ko

configname: CONFIG_FB_CFB_FILLRECT

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Frame buffer Devices
└─>Support for frame buffer devices
└─>FB_CFB_FILLRECT
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Include the cfb_fillrect function for generic software rectangle
filling. This is used by drivers that don't provide their own
(accelerated) version.

source code:
drivers/video/fbdev/core/cfbfillrect.c