ndi_event_cookie
ndi_callback_print(struct ndi_event_cookie *cookie, uint_t flags)
struct ndi_event_cookie cookie;
struct ndi_event_cookie *cookie_list;
if (mdb_vread(&cookie, sizeof (struct ndi_event_cookie),
struct ndi_event_cookie *next_cookie; /* Next cookie def'd in hdl */
#define NDI_EVENT(cookie) ((struct ndi_event_cookie *)(void *)(cookie))