Zstd

modulename: zstd.ko

configname: CONFIG_CRYPTO_ZSTD

Linux Kernel Configuration
└─>Cryptographic API
└─>Compression
└─>Zstd
In linux kernel since version 3.10 (release Date: 2013-06-30)  
zstd compression algorithm

See https://github.com/facebook/zstd for further information.

source code:
crypto/zstd.c

depends
CONFIG_CRYPTO

is selected by
CONFIG_ZRAM