[GIT PULL] io_uring fixes for 5.8-rc2

[Jens Axboe]

Hi Linus,

io_uring fixes that should go into this release:

- Catch a case where io_sq_thread() didn't do proper mm acquire

- Ensure poll completions are reaped on shutdown

- Async cancelation and run fixes (Pavel)

- io-poll race fixes (Xiaoguang)

- Request cleanup race fix (Xiaoguang)

Please pull!

The following changes since commit b3a9e3b9622ae10064826dccb4f7a52bd88c7407:

  Linux 5.8-rc1 (2020-06-14 12:45:04 -0700)

are available in the Git repository at:

  git://git.kernel.dk/linux-block.git tags/io_uring-5.8-2020-06-19

for you to fetch changes up to 6f2cc1664db20676069cff27a461ccc97dbfd114:

  io_uring: fix possible race condition against REQ_F_NEED_CLEANUP (2020-06-18 08:32:44 -0600)

----------------------------------------------------------------
io_uring-5.8-2020-06-19

----------------------------------------------------------------
Jens Axboe (2):
      io_uring: acquire 'mm' for task_work for SQPOLL
      io_uring: reap poll completions while waiting for refs to drop on exit

Pavel Begunkov (7):
      io_uring: fix lazy work init
      io-wq: reorder cancellation pending -> running
      io-wq: add an option to cancel all matched reqs
      io_uring: cancel all task's requests on exit
      io_uring: batch cancel in io_uring_cancel_files()
      io_uring: lazy get task
      io_uring: cancel by ->task not pid

Xiaoguang Wang (3):
      io_uring: don't fail links for EAGAIN error in IOPOLL mode
      io_uring: add memory barrier to synchronize io_kiocb's result and iopoll_completed
      io_uring: fix possible race condition against REQ_F_NEED_CLEANUP

 fs/io-wq.c    | 108 ++++++++++++++++++-----------------
 fs/io-wq.h    |   4 +-
 fs/io_uring.c | 177 +++++++++++++++++++++++++++++++++++++++-------------------
 3 files changed, 177 insertions(+), 112 deletions(-)

-- 
Jens Axboe