On Thu, Jun 27, 2019 at 09:22:40AM +0200, Christoph Hellwig wrote:

On Thu, Jun 27, 2019 at 10:21:55AM +1000, Alexey Kardashevskiy wrote:

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Which comment?  Last time I asked you complaint "it is still used in
exactly the same way as before" which you later clarified that you
have a hidden out of tree user somewhere, and you only objected to

It is not hidden, anyone can download and inspect that GPL driver.

For one no one has ever posted a link.  And second as mentioned
countless times it doesn't matter, it only matters if it is in mainline,
or as a special exception actively trying to go mainline.

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the word "dead".  That has been fixed and there were no further
comments.

You still have it in the cover letter so at very least 3/4 is not a part
of this patchset then.

And I still want to see a formal statement about out-of-tree drivers
support/tolerance. If you manage to remove this code, I'll have to post
a revert (again and again) but I would rather know the exact list of
what we do and what we do not do about such drivers and if the list 1)
exists 2) is reasonable then I could try to come up with a better
solution or point others to the policy and push them to do the right
thing. Right now it is just you pretending that the nVidia driver does
not exist, this is not helping. Thanks,

We had that discussion at kernel summit and it was reported.  Anyway,
adding Greg, who usually has some pretty good prewritten letters for
this kind of thing.

I used to have one but it's been so long since anyone tried to even
think about defending the removal of functions that are not used in the
kernel tree anymore, that I can't seem to find it anymore :)

Christoph is completely correct here, if it isn't in the tree, it
doesn't matter.  We have made this "formal" statement again and again
over the years, starting with the old "stable api nonsense" document
that is in the kernel tree itself.

And he is also correct in that we talked about this specific issue, in
detail, at the maintainers summit last year, see lwn.net for the details
if you somehow missed it then.

thanks,

greg k-h