> +static inline void *folio_rmapping(struct folio *folio)
This name, just like the old one is not exaclty descriptive. I guess the
r stands for raw somehow? As a casual contributor to the fringes of the
MM I would have no idea when to use it.
All this of course also applies to the existing (__)page_rmapping, but
maybe this is a good time to sort it out.
>
> struct anon_vma *page_anon_vma(struct page *page)
> {
> + struct folio *folio = page_folio(page);
> + unsigned long mapping = (unsigned long)folio->mapping;
>
> if ((mapping & PAGE_MAPPING_FLAGS) != PAGE_MAPPING_ANON)
> return NULL;
> + return folio_rmapping(folio);
It feelds kinda silly to not just open code folio_rmapping here
given that we alredy went half the way.
