Is this going into 4.4 through the iio tree?  If not is there any chance
to get it in through some other tree?  While we're not past the merge
window is trivial new functionality that doesn't change code, and I'd like to
move existing configfs users over to it ASAP, so getting it into a baseline
tree ASAP would be immensely helpful.

Oh, and:

Reviewed-by: Christoph Hellwig <hch@lst.de>

(I though we already had that, but oh well)