io_uring: better ref handling in poll_remove_one

Instead of io_put_req() to drop not a final ref, use req_ref_put(),
which is slimmer and will also check the invariant.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/85b5774ce13ae55cc2e705abdc8cbafe1212f1bd.1617287883.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 edb5b9d0fd1a8d746deb4aa0462757933d871ad7..e92de7e206c07f939843981d10ee1a4b40c771a5 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5244,7 +5244,7 @@ static bool io_poll_remove_waitqs(struct io_kiocb *req)
                /* non-poll requests have submit ref still */
                do_complete = __io_poll_remove_one(req, &apoll->poll, true);
                if (do_complete) {
-                       io_put_req(req);
+                       req_ref_put(req);
                        kfree(apoll->double_poll);
                        kfree(apoll);
                }