Merge tag 'io_uring-5.15-2021-09-17' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:
 "Mostly fixes for regressions in this cycle, but also a few fixes that
  predate this release.

  The odd one out is a tweak to the direct files added in this release,
  where attempting to reuse a slot is allowed instead of needing an
  explicit removal of that slot first. It's a considerable improvement
  in usability to that API, hence I'm sending it for -rc2.

   - io-wq race fix and cleanup (Hao)

   - loop_rw_iter() type fix

   - SQPOLL max worker race fix

   - Allow poll arm for O_NONBLOCK files, fixing a case where it's
     impossible to properly use io_uring if you cannot modify the file
     flags

   - Allow direct open to simply reuse a slot, instead of needing it
     explicitly removed first (Pavel)

   - Fix a case where we missed signal mask restoring in cqring_wait, if
     we hit -EFAULT (Xiaoguang)"

* tag 'io_uring-5.15-2021-09-17' of git://git.kernel.dk/linux-block:
  io_uring: allow retry for O_NONBLOCK if async is supported
  io_uring: auto-removal for direct open/accept
  io_uring: fix missing sigmask restore in io_cqring_wait()
  io_uring: pin SQPOLL data before unlocking ring lock
  io-wq: provide IO_WQ_* constants for IORING_REGISTER_IOWQ_MAX_WORKERS arg items
  io-wq: fix potential race of acct->nr_workers
  io-wq: code clean of io_wqe_create_worker()
  io_uring: ensure symmetry in handling iter types in loop_rw_iter()

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