This change is now in Linus's 4.4rc4 tree:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0208e951d55c435137543e12d7ee795c3784713a
Which means it will make it into Xenial, and could be cherry picked into the Xenial 4.3 branch in the mean time.
This change is now in Linus's 4.4rc4 tree:
https:/ /git.kernel. org/cgit/ linux/kernel/ git/torvalds/ linux.git/ commit/ ?id=0208e951d55 c435137543e12d7 ee795c3784713a
Which means it will make it into Xenial, and could be cherry picked into the Xenial 4.3 branch in the mean time.