A bit more googling shows that this change was actually not suitable for inclusion in kernels versions prior to 3.8.0: http://oss.sgi.com/archives/xfs/2013-02/msg00201.html
...which is why it had been reverted in 3.7.9, after it was added by mistake in a previous 3.7.x version: https://lkml.org/lkml/2013/2/15/638
Hope this helps.
A bit more googling shows that this change was actually not suitable for inclusion in kernels versions prior to 3.8.0: oss.sgi. com/archives/ xfs/2013- 02/msg00201. html
http://
...which is why it had been reverted in 3.7.9, after it was added by mistake in a previous 3.7.x version: /lkml.org/ lkml/2013/ 2/15/638
https:/
Hope this helps.