On Fri, Mar 04, 2016 at 04:56:03PM -0800, Darrick J. Wong wrote:

Invalidate the page cache (as a regular O_DIRECT write would do) to avoid
returning stale cache contents at a later time.

v5: Refactor the 4.4 refactoring of the ioctl code into separate functions.
Split the page invalidation and the new ioctl into separate patches.

Signed-off-by: Darrick J. Wong <redacted>

Didn't I review this already?  If not:

Reviewed-by: Christoph Hellwig <redacted>