The statx system call is for providing enhanced file information. As explained in that earlier Phoronix article from a few months back, this new statx() system call would be able to return the file's creation time, data version number, and other new attributes not currently provided. These new attributes wouldn't work for all file-systems, but would work for a subset of them such as CIFS, NFS, and others that track such information.
The statx system call is also designed to better support for the Year 2038 problem, support lightweight stat, greater compatibility with BSD stat, and better support for future additions.
The pull request was sent in this morning. More details on the statx system call capabilities can be found from the earlier patch review.