Re: [PATCH 00/10] iov_iter: Add new iters and use with AFS

From: Matthew Wilcox
Date: Thu Sep 13 2018 - 12:11:00 EST

On Thu, Sep 13, 2018 at 04:51:35PM +0100, David Howells wrote:
> (5) Add an ITER_DISCARD iterator type. This provides an iterator that
> simply discards anything written to it. It cannot be used as a data
> source.

May I suggest an ITER_ZERO iterator type instead? It acts like /dev/zero;
writes are discarded (as you have here) and reads return zeroes.
I've wanted such a thing in the past, but got distracted away from
that project.