[GIT PULL] io_uring fixes for 5.7-rc1

[Jens Axboe]

Hi Linus,

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+ sockets.
In particular, this pull request contains:

- Fixes for races or deadlocks around poll handling

- Don't double account fixed files against RLIMIT_NOFILE

- IORING_OP_OPENAT LFS fix

- 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)

Please pull!


  git://git.kernel.dk/linux-block.git io_uring-5.7-2020-04-09


----------------------------------------------------------------
Bijan Mottahedeh (1):
      io_uring: process requests completed with -EAGAIN on poll list

Colin Ian King (1):
      io_uring: remove redundant variable pointer nxt and io_wq_assign_next call

Hillf Danton (1):
      io_uring: add missing finish_wait() in io_sq_thread()

Jens Axboe (6):
      io_uring: retry poll if we got woken with non-matching mask
      io_uring: grab task reference for poll requests
      io_uring: use io-wq manager as backup task if task is exiting
      io_uring: remove bogus RLIMIT_NOFILE check in file registration
      io_uring: ensure openat sets O_LARGEFILE if needed
      io_uring: punt final io_ring_ctx wait-and-free to workqueue

Pavel Begunkov (6):
      io_uring: fix ctx refcounting in io_submit_sqes()
      io_uring: simplify io_get_sqring
      io_uring: alloc req only after getting sqe
      io_uring: remove req init from io_get_req()
      io_uring: don't read user-shared sqe flags twice
      io_uring: fix fs cleanup on cqe overflow

Xiaoguang Wang (3):
      io_uring: refactor file register/unregister/update handling
      io_uring: initialize fixed_file_data lock
      io_uring: do not always copy iovec in io_req_map_rw()

 fs/io-wq.c    |  12 ++
 fs/io-wq.h    |   2 +
 fs/io_uring.c | 428 ++++++++++++++++++++++++++++++++++------------------------
 3 files changed, 269 insertions(+), 173 deletions(-)

-- 
Jens Axboe