using sizeof operator

[Daniel Baluta]

On Sun, Jan 22, 2012 at 8:14 PM, Sukrit Sangwan <sukritsangwan at gmail.com> wrote:
> There are instances in the code where sizeof(*ptr) is used. e.g.
> in net/802/garp.c
>           const struct garp_msg_hdr *gm;
>           if (!pskb_may_pull(skb, sizeof(*gm)))
>  return -1;
> i want to ask is there any sense in using sizeof(struct garp_msg_hdr)
> instead of sizeof(*gm) in the above example.

Imagine what would happen if you change the name of struct garp_msg_hdr;

thanks,
Daniel.