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TAKE 957103 - Checkin mainline change: use proper mnt_want_write calls f

To: xfs@xxxxxxxxxxx, sgi.bugs.xfs@xxxxxxxxxxxx
Subject: TAKE 957103 - Checkin mainline change: use proper mnt_want_write calls for handle ioctl
From: donaldd@xxxxxxx (Donald Douwsma)
Date: Wed, 22 Oct 2008 16:23:49 +1100 (EST)
Since 2.6.26 all writes to filesystems need to be enclosed by a
mnt_want_write / mnt_drop_write pair instead of checking for IS_RDONLY.

XFs was updated for this in mainline but the changes to xfs_ioctl.c
were never megred back into the CVS tree.

Mainline commit 42a74f206b914db13ee1f5ae932dcd91a77c8579

Signed-off-by: Dave Hansen <haveblue@xxxxxxxxxx>

Date:  Wed Oct 22 16:20:31 EST 2008
Workarea:  chapter11.melbourne.sgi.com:/scratch/donaldd/isms/2.6.x-xfs
Inspected by:  haveblue@xxxxxxxxxx,hch

The following file(s) were checked into:
  longdrop.melbourne.sgi.com:/isms/linux/2.6.x-xfs-melb


Modid:  xfs-linux-melb:xfs-kern:32381a
fs/xfs/linux-2.6/xfs_ioctl.c - 1.173 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.6/xfs_ioctl.c.diff?r1=text&tr1=1.173&r2=text&tr2=1.172&f=h
        - use proper mnt_want_write calls for handle ioctl


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