Re: [PATCH liburing v3 0/2] add support for new timeout feature

["Carter Li 李通洲" <carter.li@eoitek.com>]

> diff --git a/src/include/liburing.h b/src/include/liburing.h
> index 0505a4f..82c2980 100644
> --- a/src/include/liburing.h
> +++ b/src/include/liburing.h
> @@ -56,6 +56,9 @@ struct io_uring {
>  	struct io_uring_sq sq;
>  	struct io_uring_cq cq;
>  	unsigned flags;
> +	unsigned flags_internal;
> +	unsigned features;
> +	unsigned pad[4];
>  	int ring_fd;
>  };

Won't it break existing code runs on newer kernel?
Won't it break code compiled with new liburing but runs on older kernel?

IMO In this case, a new syscall `io_uring_setup2` is required at least.

Regards,
Carter