CONFIG_SG_SPLIT (not configurable)

modulename: sg_split.ko

configname: CONFIG_SG_SPLIT

Linux Kernel Configuration
└─>Library routines
└─>SG_SPLIT
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Provides a helper to split scatterlists into chunks, each chunk being
a scatterlist. This should be selected by a driver or an API which
whishes to split a scatterlist amongst multiple DMA channels.

source code:
lib/sg_split.c