Hi Jan,
the three patches below wire up the synchronous page fault code for XFS.
I've only verified it by making sure we always use the synchronous fault
path and then running xfstests, so don't use it for critical applications
just yet :)
This is against the current tree at:
git://git.kernel.org//pub/scm/linux/kernel/git/jack/linux-fs.git dax_sync_fault
