CONFIG_CRYPTO_SM4 (not configurable)

modulename: sm4.ko

configname: CONFIG_CRYPTO_SM4

Linux Kernel Configuration
└─>Cryptographic API
└─>Block ciphers
└─>CRYPTO_SM4
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
crypto/sm4.c
depends
CONFIG_CRYPTO