CONFIG_X86_LOCAL_APIC (not configurable)

modulename: perfctr-watchdog.ko

and/or

apic.ko

configname: CONFIG_X86_LOCAL_APIC

Linux Kernel Configuration
└─>Processor type and features
└─>X86_LOCAL_APIC
In linux kernel since version 2.6.12 )
source code:
arch/x86/kernel/cpu/