Add {PhysFrame,Page}::from_start_address_unchecked.

[m-ou-se]

No description provided.

[m-ou-se]

const fns apparently don't combine with generics yet, without the const_fn feature. So there's both a const and non-const version of the function.

[m-ou-se]

So there's both a const and non-const version of the function.

#144 would remove the need for duplication here.

[m-ou-se]

#144 would remove the need for duplication here.

Updated.

[phil-opp]

Thanks! Looks good to me overall.

I think we should probably name these methods from_start_address_unchecked instead of *_unsafe. I know that this would be inconsistent with the naming introduced in #141, but we might want to rename these methods to new_unchecked in the long term too (after a deprecation period).

[m-ou-se]

Sure, sounds good. One sec.

[m-ou-se]

Done.

[phil-opp]

Thanks!