CONFIG_DMA_COHERENT_POOL (not configurable)

modulename: pool.ko

configname: CONFIG_DMA_COHERENT_POOL

Linux Kernel Configuration
└─>Library routines
└─>DMA_COHERENT_POOL
In linux kernel since version 5.1 (release Date: 2019-05-05)  
source code:
kernel/dma/pool.c