drivers/md/persistent-data/Kconfig - kernel/windcharger - Git at Google

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