Is is such necessary? I suspect extra shifts on some architectures.

> On 20 Jan 2025, at 20:36, Alexander Bluhm <bluhm@openbsd.org> wrote:
> 
> -	u_int			 ph_ifidx;	/* rcv interface index */
> +	u_int16_t		 ph_ifidx;	/* rcv interface index */