Merge tag 'io_uring-6.19-20251208' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linuxHEADmaster

Pull io_uring updates from Jens Axboe:
 "Followup set of fixes for io_uring for this merge window. These are
  either later fixes, or cleanups that don't make sense to defer. This
  pull request contains:

   - Fix for a recent regression in io-wq worker creation

   - Tracing cleanup

   - Use READ_ONCE/WRITE_ONCE consistently for ring mapped kbufs. Mostly
     for documentation purposes, indicating that they are shared with
     userspace

   - Fix for POLL_ADD losing a completion, if the request is updated and
     now is triggerable - eg, if POLLIN is set with the updated, and the
     polled file is readable

   - In conjunction with the above fix, also unify how poll wait queue
     entries are deleted with the head update. We had 3 different spots
     doing both the list deletion and head write, with one of them
     nicely documented. Abstract that into a helper and use it
     consistently

   - Small series from Joanne fixing an issue with buffer cloning, and
     cleaning up the arg validation"

* tag 'io_uring-6.19-20251208' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  io_uring/poll: unify poll waitqueue entry and list removal
  io_uring/kbuf: use WRITE_ONCE() for userspace-shared buffer ring fields
  io_uring/kbuf: use READ_ONCE() for userspace-mapped memory
  io_uring/rsrc: fix lost entries after cloned range
  io_uring/rsrc: rename misleading src_node variable in io_clone_buffers()
  io_uring/rsrc: clean up buffer cloning arg validation
  io_uring/trace: rename io_uring_queue_async_work event "rw" field
  io_uring/io-wq: always retry worker create on ERESTART*
  io_uring/poll: correctly handle io_poll_add() return value on update

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