[git pull] Christoph's aio poll, saner this time around

[Al Viro]

This time it's pretty much local to fs/aio.c.  Hopefully race-free...

The following changes since commit 1ffaddd029c867d134a1dde39f540dcc8c52e274:

  Linux 4.18-rc8 (2018-08-05 12:37:41 -0700)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.aio

for you to fetch changes up to e8693bcfa0b4a56268946f0756153d942cb66cf7:

  aio: allow direct aio poll comletions for keyed wakeups (2018-08-06 10:24:39 +0200)

----------------------------------------------------------------
Christoph Hellwig (4):
      timerfd: add support for keyed wakeups
      aio: add a iocb refcount
      aio: implement IOCB_CMD_POLL
      aio: allow direct aio poll comletions for keyed wakeups

 fs/aio.c                     | 208 ++++++++++++++++++++++++++++++++++++++++++-
 fs/timerfd.c                 |   6 +-
 include/uapi/linux/aio_abi.h |   6 +-
 3 files changed, 209 insertions(+), 11 deletions(-)