TAKE - use more kernel builtins in 2.5 for dcache handling

[Steve Lord <lord@xxxxxxx>]

Another one from Christoph, there are now kernel functions
to do some of the dcache handling xfs was doing for itself.

Date:  Sun Jun  9 05:38:16 PDT 2002
Workarea:  jen.americas.sgi.com:/src/lord/xfs-linux.2.5

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.5.x-xfs


Modid:  2.5.x-xfs:slinx:121118a
linux/fs/xfs/xfs_dmapi.c - 1.60
linux/fs/xfs/linux/xfs_super.c - 1.188
linux/fs/xfs/linux/xfs_ioctl.c - 1.68