TAKE - use tricks from __constant_memcpy to make do_div type safe

[Steve Lord <lord@xxxxxxx>]

Change do_div and do_mod definitions passed on to the xfs code to be
sensitive to the size of the arguments so that XFS should still build
and run if the XFS_BIG_FILES and XFS_BIG_FILESYSTEMS definitions are
changed.

Date:  Fri Aug 11 08:20:42 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:71907a
linux/fs/xfs/xfs_bmap.c - 1.258
        - Change a call to do_mod to not pass in an expression - this does not
          work with the new definition.

linux/fs/xfs/xfs_os_defs.h - 1.11
        - Change do_div and do_mod definitions passed on to the xfs code to be
          sensitive to the size of the arguments so that XFS should still build
          and run if the XFS_BIG_FILES and XFS_BIG_FILESYSTEMS definitions are
          changed.