CONFIG_CRYPTO_TWOFISH_COMMON (not configurable)

modulename: twofish_common.ko

configname: CONFIG_CRYPTO_TWOFISH_COMMON

Linux Kernel Configuration
└─>Cryptographic options
└─>CRYPTO_TWOFISH_COMMON
In linux kernel since version 2.6.19 (release Date: 2006-11-29)  
Common parts of the Twofish cipher algorithm shared by the
generic c and the assembler implementations.

source code:
crypto/twofish_common.c
depends
CONFIG_CRYPTO