CONFIG_PSTORE_ZONE (not configurable)

modulename: pstore_zone.ko

configname: CONFIG_PSTORE_ZONE

Linux Kernel Configuration
└─>File systems
└─>Miscellaneous filesystems
└─>PSTORE_ZONE
In linux kernel since version 5.1 (release Date: 2019-05-05)  
The common layer for pstore/blk (and pstore/ram in the future)
to manage storage in zones.

source code: