[PATCH 1/5] xfs: avoid taking the ilock unnessecarily in xfs_qm_dqattach

[Mark Tinguely]

On 03/27/12 09:34, Christoph Hellwig wrote:
> Check if we actually need to attach a dquot before taking the ilock in
> xfs_qm_dqattach.  This avoid superflous lock roundtrips for the common cases
> of quota support compiled in but not activated on a filesystem and an
> inode that already has the dquots attached.
>
> Signed-off-by: Christoph Hellwig<hch at lst.de>

Looks good.

Reviewed-by: Mark Tinguely <tinguely at sgi.com>