CONFIG_HAS_DMA (not configurable)

modulename: mapping.ko

and/or

dmapool.ko

and/or

dma.ko

configname: CONFIG_HAS_DMA

Linux Kernel Configuration
└─>Library routines
└─>HAS_DMA
In linux kernel since version 2.6.22 (release Date: 2007-07-08)  
source code:
kernel/dma/
depends
NOT CONFIG_NO_DMA

is selected by
CONFIG_UIO_PRUSS