CONFIG_GENERIC_ATOMIC64 (not configurable)

modulename: atomic64.ko

configname: CONFIG_GENERIC_ATOMIC64

Linux Kernel Configuration
└─>Library routines
└─>GENERIC_ATOMIC64
In linux kernel since version 2.6.31 (release Date: 2009-09-09)  
source code:
lib/atomic64.c
is selected by
CONFIG_APPLE_DART