CONFIG_CHASH (not configurable)

modulename: chash.ko

configname: CONFIG_CHASH

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>AMD Library routines
└─>CHASH
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Statically sized closed hash table implementation with low
memory and CPU overhead.

source code:
drivers/gpu/drm//amd/lib/chash.c

is depended by
CONFIG_DRM_AMDGPU