These patches turn on the field types in the directory feature.
Patch one adds the field type feature bit and feature check.
this is just like the kernel version.
Patch two adds the feature to mkfs.xfs using a new "-n ftype=1" option.
always enable the feature in v5.
These are additions to Dave's Linux 3.12 and field type support patches:
# patch one below
# patch two below
Minor syncing of the 49 patch series is required due to recent commits.