Add a XFS_ prefix to IO_DIRECT,XFS_IO_DELALLOC, XFS_IO_UNWRITTEN and
XFS_IO_OVERWRITE. This to avoid namespace conflict with other modules.
Signed-off-by: NAlain Renaud <arenaud@sgi.com>
Reviewed-by: NRich Johnston <rjohnston@sgi.com>
Signed-off-by: NBen Myers <bpm@sgi.com>