Testing module

modulename: tcrypt.ko

and/or

crypt_s390_query.ko

configname: CONFIG_CRYPTO_TEST

Linux Kernel Configuration
└─>Cryptographic options
└─>Testing module
In linux kernel since version 2.6.12  
Quick & dirty crypto test module.

source code:
crypto/tcrypt.c

depends
CONFIG_CRYPTO |
| CONFIG_MODULES or CONFIG_EXPERT or CONFIG_MODULES