[PATCH 2/3] xfs: prevent against ioend livelocks in xfs_file_fsync

[Alex Elder]

On Tue, 2011-07-26 at 11:07 -0400, Christoph Hellwig wrote:
> We need to take some locks to prevent new ioends from coming in when we wait
> for all existing ones to go away.  Up to Linux 3.0 that was done using the
> i_mutex held by the VFS fsync code, but now that we are called without
> it we need to take care of it ourselves.  Use the I/O lock instead of
> i_mutex just like we do in other places.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>

Looks good.

Reviewed-by: Alex Elder <aelder at sgi.com>