TAKE - speed up hole filling when writing beyond of file

[Steve Lord <lord@xxxxxxx>]

Date:  Tue Sep  5 11:37:51 PDT 2000
Workarea:  jen.americas.sgi.com:/src/lord/xfs-linux.2.4.0-test5

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.0-test1-xfs


Modid:  2.4.0-test1-xfs:slinx:73647a
linux/fs/xfs/linux/xfs_lrw.c - 1.54
        - Make zero_eof I/O requests async instead of sync - we will still 
probably
          end up waiting for one of the pages in here shortly after this, but 
some
          cases will get faster.