Merge tag 'io_uring-5.7-2020-04-09' of git://

Pull io_uring fixes from Jens Axboe:
 "Here's a set of fixes that either weren't quite ready for the first,
  or came about from some intensive testing on memcached with 350K+


   - Fixes for races or deadlocks around poll handling

   - Don't double account fixed files against RLIMIT_NOFILE


   - Poll retry handling (Bijan)

   - Missing finish_wait() for SQPOLL (Hillf)

   - Cleanup/split of io_kiocb alloc vs ctx references (Pavel)

   - Fixed file unregistration and init fixes (Xiaoguang)

   - Various little fixes (Xiaoguang, Pavel, Colin)"

* tag 'io_uring-5.7-2020-04-09' of git://
  io_uring: punt final io_ring_ctx wait-and-free to workqueue
  io_uring: fix fs cleanup on cqe overflow
  io_uring: don't read user-shared sqe flags twice
  io_uring: remove req init from io_get_req()
  io_uring: alloc req only after getting sqe
  io_uring: simplify io_get_sqring
  io_uring: do not always copy iovec in io_req_map_rw()
  io_uring: ensure openat sets O_LARGEFILE if needed
  io_uring: initialize fixed_file_data lock
  io_uring: remove redundant variable pointer nxt and io_wq_assign_next call
  io_uring: fix ctx refcounting in io_submit_sqes()
  io_uring: process requests completed with -EAGAIN on poll list
  io_uring: remove bogus RLIMIT_NOFILE check in file registration
  io_uring: use io-wq manager as backup task if task is exiting
  io_uring: grab task reference for poll requests
  io_uring: retry poll if we got woken with non-matching mask
  io_uring: add missing finish_wait() in io_sq_thread()
  io_uring: refactor file register/unregister/update handling