On 06/01/2011 08:35 AM, Eduard - Gabriel Munteanu wrote: > Maybe it's not nice, but you're missing the fact upcasting gives you > some type safety. With opaques you have none. Lol. Do you understand what container_of does? This is not dynamic_cast<> with RTTI. You can put any type name in there that you like, so long as it has a field name to match. The type of the field you give doesn't even have to match the type of the pointer that you pass in. Type safety this is not. r~ -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html