TAKE - wait for async IOs before tearing down fs at umount time

[Eric Sandeen <sandeen@xxxxxxx>]

Wait for all async buffers to complete before tearing down
the filesystem at umount time

Date:  Thu Nov 11 19:18:17 PST 2004
Workarea:  penguin.americas.sgi.com:/src/eric/xfs-trees/xfs-GUT-iodone2
Inspected by:
nathans
cattelan
Author:  sandeen

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/xfs-kern/xfs-linux


Modid:  xfs-linux:xfs-kern:182694a
xfs_mount.h - 1.191
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/xfs_mount.h.diff?r1=text&tr1=1.191&r2=text&tr2=1.190&f=h
        - prototype for xfs_unmountfs_wait

xfs_mount.c - 1.353
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/xfs_mount.c.diff?r1=text&tr1=1.353&r2=text&tr2=1.352&f=h
        - call xfs_wait_buftarg before starting to tear down the filesystem
          at umount time

linux-2.6/xfs_buf.h - 1.101
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.6/xfs_buf.h.diff?r1=text&tr1=1.101&r2=text&tr2=1.100&f=h
        - prototype for xfs_wait_buftarg

linux-2.6/xfs_buf.c - 1.180
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.6/xfs_buf.c.diff?r1=text&tr1=1.180&r2=text&tr2=1.179&f=h
        - add xfs_wait_buftarg - returns only when all async bufs for a 
buftarg
          are complete

linux-2.4/xfs_buf.h - 1.107
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.4/xfs_buf.h.diff?r1=text&tr1=1.107&r2=text&tr2=1.106&f=h
        - prototype for xfs_wait_buftarg

linux-2.4/xfs_buf.c - 1.199
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.4/xfs_buf.c.diff?r1=text&tr1=1.199&r2=text&tr2=1.198&f=h
        - add xfs_wait_buftarg - returns only when all async bufs for a 
buftarg
          are complete