TAKE - XFS part of 2.5.40 merge

[Steve Lord <lord@xxxxxxx>]

fall back to schedule_task from the per cpu io completion threads,
this should be temporary.


Date:  Wed Oct  2 08:38:11 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:128890a
linux/fs/xfs/xfs_log.c - 1.255
        - call schedule_task instead of pagebuf_queue_task

linux/fs/xfs/pagebuf/page_buf.c - 1.63
        - remove pagebuf io completion threads

linux/fs/xfs/pagebuf/page_buf.h - 1.46
        - remove pagebuf_queue_task