io_uring: don't inflight-track linked timeouts

Tracking linked timeouts as infligh was needed to make sure that io-wq
is not destroyed by io_uring_cancel_generic() racing with
io_async_cancel_one() accessing it. Now, cancellations issued by linked
timeouts are done in the task context, so it's already synchronised.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/e1b05cf47cb69df2305efdbee8cf7ba36f46c1a3.1628981736.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 86466e1..5b95ab6 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5701,8 +5701,6 @@ static int io_timeout_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe,
 
        data->mode = io_translate_timeout_mode(flags);
        hrtimer_init(&data->timer, CLOCK_MONOTONIC, data->mode);
-       if (is_timeout_link)
-               io_req_track_inflight(req);
        return 0;
 }