io_submit_flush_completions() is called down the stack in the _state
version of io_req_complete(), that's ok because is only called by
io_uring opcode handler functions directly. Move it up to
__io_queue_sqe() as preparation.
Signed-off-by: NPavel Begunkov <asml.silence@gmail.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>