[RFC PATCH 2/4] net: pass 'optlen_t' to proto[ops].getsockopt() hooks

[Stefan Metzmacher]

> diff --git a/net/socket.c b/net/socket.c
> index 9a0e720f0859..fa2de12c10e6 100644
> --- a/net/socket.c
> +++ b/net/socket.c
> @@ -2350,12 +2350,15 @@ int do_sock_getsockopt(struct socket *sock, bool compat, int level,
>   	} else if (unlikely(!ops->getsockopt)) {
>   		err = -EOPNOTSUPP;
>   	} else {
> -		if (WARN_ONCE(optval.is_kernel || optlen.is_kernel,
> +		optlen_t _optlen = { .up = NULL, };
> +
> +		if (WARN_ONCE(optval.is_kernel,

Sorry, the removal of '|| optlen.is_kernel' should be in the next commit...

>   			      "Invalid argument type"))
>   			return -EOPNOTSUPP;