Breno Leitao wrote:

Continue converting the proto-layer getsockopt callbacks to the sockopt_t
interface, switching do_raw_getsockopt() and its raw_geticmpfilter()
helper to take a sockopt_t.

The thin raw_getsockopt() wrapper keeps its __user signature for now: it
builds a user-backed sockopt_t with sockopt_init_user(), calls the helper,
and writes the returned length back to optlen. The helper uses
copy_to_iter() instead of copy_to_user(). No functional change.

Signed-off-by: Breno Leitao <leitao@debian.org>

Acked-by: Willem de Bruijn <willemb@google.com>