TAKE - Fix fsx corruption.

[Rusell Cattelan <cattelan@xxxxxxxxxxxxxxxxxxxxx>]

Date:  Tue Oct 29 16:32:36 PST 2002
Workarea:  rose.americas.sgi.com:/usr/src/2.4.x-xfs/find

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.x-xfs


Modid:  2.4.x-xfs:slinx:131438a
linux/fs/xfs/linux/xfs_aops.c - 1.11
        - fsx (file system exerciser orginally from NeXT)
          does all sorts of combinations of buffered reads/write map 
read/writes and truncates 
          This was exposing a problem in our write_page logic on file systems 
with block size < page size.