TAKE - fix O_DIRECT cache issue.

[Steve Lord <lord@xxxxxxx>]

O_DIRECT fixup, pending patch from Andrew Morton, removes the
case where we tossed cached data but never flushed it.
This has been submitted to Linus already.


Date:  Fri Oct  4 14:48:50 PDT 2002
Workarea:  jen.americas.sgi.com:/src/lord/xfs-merge.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:129129a
linux/fs/direct-io.c - 1.8
        - move the cache flush upto the same level as the 
          cache invalidate in the O_DIRECT path.