fs/overlayfs/Kconfig

   1 config OVERLAY_FS
   2         tristate "Overlay filesystem support"
   3         help
   4           An overlay filesystem combines two filesystems - an 'upper' filesystem
   5           and a 'lower' filesystem.  When a name exists in both filesystems, the
   6           object in the 'upper' filesystem is visible while the object in the
   7           'lower' filesystem is either hidden or, in the case of directories,
   8           merged with the 'upper' object.
   9
  10           For more information see Documentation/filesystems/overlayfs.txt