[GIT PULL] io_uring passthrough support

[Linus Torvalds]

On Sun, May 22, 2022 at 2:26 PM Jens Axboe <axboe at kernel.dk> wrote:
>
> This will cause a merge conflict as well, with the provided buffer
> change from the core branch, and adding CQE32 support for NOP in this
> branch.

Ugh, that really hits home how ugly this CQE32 support was.

Dammit, it shouldn't have been done this way. That io_nop() code is
disgusting, and how it wants that separate "with extra info" case is
just nasty.

I've pulled this, but with some swearing. That whole "extra1" and
"extra2" is ugly as hell, and just the naming shows that it has no
sane semantics, much less documentation.

And the way it's randomly hidden in 'struct io_nop' *and* then a union
with that hash_node is just disgusting beyond words. Why do you need
both fields when you just copy one to the other at cmd start and then
back at cmd end?

I must be missing something, but that it is incredibly ugly is clear.

                 Linus