default or selected kernelversion does not have config value CONFIG_GENERIC_PTDUMP.
Result is shown for kernelversion 6.9.9

CONFIG_GENERIC_PTDUMP (not configurable)

configname: CONFIG_GENERIC_PTDUMP

Linux Kernel Configuration
└─>Kernel hacking
└─>Memory Debugging
└─>GENERIC_PTDUMP
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
is selected by
CONFIG_PTDUMP_DEBUGFS