CONFIG_DMA_DIRECT_OPS (not configurable)

modulename: direct.ko

configname: CONFIG_DMA_DIRECT_OPS

Linux Kernel Configuration
└─>Library routines
└─>DMA_DIRECT_OPS
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
kernel/dma/direct.c
depends
CONFIG_HAS_DMA