[xfs-masters] xfs_io "BUG: lock held when returning to user space!" on suspend

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

I'm getting this:

================================================
[ BUG: lock held when returning to user space! ]
------------------------------------------------
xfs_io/18796 is leaving the kernel with locks still held!
1 lock held by xfs_io/18796:
 #0:  (&type->s_umount_key#19){----}, at: [<c048c9ac>] get_super+0x42/0x87

when I suspend, possibly during an xfs-freeze.  There don't seem to be any 
ill-effects.

Thanks,
        J