[PATCHSET v2 0/3] io_uring: make POLL_ADD support multiple waitqs

Jens Axboe
2020-02-12T20:25:19Z

Here's v2 of the "let's make POLL_ADD work on everything" patchset. As
before, patches 1-2 are just basic prep patches, and should not have any
functional changes in them. Patch 3 adds support for allocating a new
io_poll_iocb unit if we get multiple additions through our queue proc
for the wait queues. This new 'poll' addition is queued up as well, and
it grabs a reference to the original poll request.

Changes since v1:

- Fix unused 'ret' variable in io_poll_double_wake()
- Fail if we get an attempt at a third waitqueue addition (Pavel)

--
Jens Axboe