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SubjectRe: [RFC PATCH 3/5] mm/vma: add support for peer to peer to device vma

On 2019-01-29 12:44 p.m., Jerome Glisse wrote:
>> I'd suggest [1] should be a part of the patchset so we can actually see
>> a user of the stuff you're adding.
> I did not wanted to clutter patchset with device driver specific usage
> of this. As the API can be reason about in abstract way.

It's hard to reason about an interface when you can't see what all the
layers want to do with it. Most maintainers (I'd hope) would certainly
never merge code that has no callers, and for much the same reason, I'd
rather not review patches that don't have real use case examples.


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