src/kernel/linux/v4.19/drivers/md/persistent-data/Kconfig

config DM_PERSISTENT_DATA
       tristate
       depends on BLK_DEV_DM
       select LIBCRC32C
       select DM_BUFIO
       ---help---
	 Library providing immutable on-disk data structure support for
	 device-mapper targets such as the thin provisioning target.