[GIT PULL] io_uring fixes for 5.6-rc1

[Jens Axboe]

Hi Linus,

Some later fixes for io_uring that should go into this merge window.
This pull request contains:

- Small cleanup series from Pavel

- Belt and suspenders build time check of sqe size and layout (Stefan)

- Addition of ->show_fdinfo() on request of Jann Horn, to aid in
  understanding mapped personalities

- eventfd recursion/deadlock fix, for both io_uring and aio

- Fixup for send/recv handling

- Fixup for double deferral of read/write request

- Fix for potential double completion event for close request

- Adjust fadvise advice async/inline behavior

- Fix for shutdown hang with SQPOLL thread

- Fix for potential use-after-free of fixed file table

Please pull!


  git://git.kernel.dk/linux-block.git tags/io_uring-5.6-2020-02-05


----------------------------------------------------------------
Jens Axboe (10):
      io_uring: add ->show_fdinfo() for the io_uring file descriptor
      eventfd: track eventfd_signal() recursion depth
      io_uring: prevent potential eventfd recursion on poll
      io_uring: use the proper helpers for io_send/recv
      io_uring: don't map read/write iovec potentially twice
      io_uring: fix sporadic double CQE entry for close
      io_uring: punt even fadvise() WILLNEED to async context
      aio: prevent potential eventfd recursion on poll
      io_uring: spin for sq thread to idle on shutdown
      io_uring: cleanup fixed file data table references

Pavel Begunkov (3):
      io_uring: remove extra ->file check
      io_uring: iterate req cache backwards
      io_uring: put the flag changing code in the same spot

Stefan Metzmacher (1):
      io_uring: add BUILD_BUG_ON() to assert the layout of struct io_uring_sqe

 fs/aio.c                |  20 +++-
 fs/eventfd.c            |  15 +++
 fs/io_uring.c           | 254 ++++++++++++++++++++++++++++++++++++++----------
 include/linux/eventfd.h |  14 +++
 4 files changed, 251 insertions(+), 52 deletions(-)

-- 
Jens Axboe