[GIT PULL] io_uring fixes for 5.11-rc

[Jens Axboe <axboe@kernel.dk>]

Hi Linus,

A few fixes that should go into 5.11, all marked for stable as well:

- Fix issue around identity COW'ing and users that share a ring across
  processes

- Fix a hang associated with unregistering fixed files (Pavel)

- Move the 'process is exiting' cancelation a bit earlier, so task_works
  aren't affected by it (Pavel)

Please pull!


The following changes since commit 5c8fe583cce542aa0b84adc939ce85293de36e5e:

  Linux 5.11-rc1 (2020-12-27 15:30:22 -0800)

are available in the Git repository at:

  git://git.kernel.dk/linux-block.git tags/io_uring-5.11-2021-01-01

for you to fetch changes up to b1b6b5a30dce872f500dc43f067cba8e7f86fc7d:

  kernel/io_uring: cancel io_uring before task works (2020-12-30 19:36:54 -0700)

----------------------------------------------------------------
io_uring-5.11-2021-01-01

----------------------------------------------------------------
Jens Axboe (1):
      io_uring: don't assume mm is constant across submits

Pavel Begunkov (3):
      io_uring: add a helper for setting a ref node
      io_uring: fix io_sqe_files_unregister() hangs
      kernel/io_uring: cancel io_uring before task works

 fs/file.c     |  2 --
 fs/io_uring.c | 60 ++++++++++++++++++++++++++++++++++++++++-------------------
 kernel/exit.c |  2 ++
 3 files changed, 43 insertions(+), 21 deletions(-)

-- 
Jens Axboe