[PATCH 3/6] xfs: add DAX file operations support

[Christoph Hellwig]

On Tue, Mar 24, 2015 at 03:27:27PM +1100, Dave Chinner wrote:
> Turns out there's no great need to write splice tests for xfstests -
> the current loopback device uses splice, and so all of the tests
> that run on loopback are exercising the splice path through the
> filesystem.

FYI, we're getting rid of the splice read (ab-)use in loop, so this
won't last forever.