drivers/md/persistent-data/Kconfig

   1 config DM_PERSISTENT_DATA
   2        tristate
   3        depends on BLK_DEV_DM && EXPERIMENTAL
   4        select LIBCRC32C
   5        select DM_BUFIO
   6        ---help---
   7          Library providing immutable on-disk data structure support for
   8          device-mapper targets such as the thin provisioning target.