CONFIG_HARDLOCKUP_DETECTOR (not configurable)

modulename: watchdog.ko

and/or

watchdog_hld.ko

and/or

hw_nmi.ko

configname: CONFIG_HARDLOCKUP_DETECTOR

Linux Kernel Configuration
└─>HARDLOCKUP_DETECTOR
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
source code:
arch/x86/kernel/apic/hw_nmi.c
selects

CONFIG_LOCKUP_DETECTOR
CONFIG_HARDLOCKUP_DETECTOR_PERF
CONFIG_HARDLOCKUP_DETECTOR_ARCH