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SubjectRe: [PATCH 00/10] iov_iter: Add new iters and use with AFS
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Matthew Wilcox <willy@infradead.org> 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.

I thought about that, but the zero-filling is not as easy to implement as the
discard side - plus I don't have any use case to test it with.

Do you have a use case in mind?

David

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