GitLab

      entry using the corresponding index key.  To get an index context,
      use ntfs_index_ctx_get() and to release it, use ntfs_index_ctx_put().
      This also adds a new slab cache for the index contexts.  To lookup a
      key in an index inode, use ntfs_index_lookup().  After modifying an
      index entry, call ntfs_index_entry_flush_dcache_page() followed by
      ntfs_index_entry_mark_dirty() to ensure the changes are written out
      to disk.  For details see fs/ntfs/index.[hc].  Note, at present, if
      an index entry is in the index allocation attribute rather than the
      index root attribute it will not be written out (you will get a
      warning message about discarded changes instead).
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>