CONFIG_CRC7 (not configurable)

modulename: crc7.ko

configname: CONFIG_CRC7

Linux Kernel Configuration
└─>Library routines
└─>CRC7
In linux kernel since version 2.6.23 (release Date: 2007-10-09)  
The CRC7 library functions. Select this if your module uses any of
the functions from <linux/crc7.h>.

source code:
lib/crc7.c