CONFIG_ARM_PTDUMP_CORE is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_ARM_PTDUMP_CORE (not configurable)

modulename: dump.ko

configname: CONFIG_ARM_PTDUMP_CORE

Linux Kernel Configuration
└─>ARM_PTDUMP_CORE
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
arch/arm/mm/dump.c