io_uring: mark requests that we can do poll async in io_op_defs

Add a pollin/pollout field to the request table, and have commands that
we can safely poll for properly marked.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2020-02-20 09:59:44 -07:00
commit 8a72758c51