[PATCH 0/5] fixes for REQ_F_COMP_LOCKED

[Pavel Begunkov <asml.silence@gmail.com>]

This removes REQ_F_COMP_LOCKED to fix a couple of problems with it.

[5/5] is harsh and some work should be done to ease the aftermath,
i.e. io_submit_flush_completions() and maybe fail_links().

Another way around would be to replace the flag with an comp_locked
argument in put_req(), free_req() and so on, but IMHO in a long run
removing it should be better.

note: there is a new io_req_task_work_add() call in [5/5]. Jens,
could you please verify whether passed @twa_signal_ok=true is ok,
because I don't really understand the difference.

Pavel Begunkov (5):
  io_uring: don't set COMP_LOCKED if won't put
  io_uring: don't unnecessarily clear F_LINK_TIMEOUT
  io_uring: don't put a poll req under spinlock
  io_uring: dig out COMP_LOCK from deep call chain
  io_uring: fix REQ_F_COMP_LOCKED by killing it

 fs/io_uring.c | 158 ++++++++++++++++++--------------------------------
 1 file changed, 57 insertions(+), 101 deletions(-)

-- 
2.24.0