On Tue, Jul 20, 2021 at 01:42:11PM +0300, Mike Rapoport wrote: > > diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h > > index f7c165b5991f..bd0e7e91bfd4 100644 > > --- a/include/linux/pagemap.h > > +++ b/include/linux/pagemap.h > > @@ -406,6 +406,17 @@ static inline pgoff_t folio_index(struct folio *folio) > > return folio->index; > > } > > > > +/** > > + * folio_next_index - Get the index of the next folio. > > + * @folio: The current folio. > > + * > > + * Return: The index of the folio which follows this folio in the file. > > + */ > > Maybe note that index is in units of pages? I don't think this is the place to explain that. Remember, we already have: * @index: Offset within the file, in units of pages. For anonymous pages, * this is the index from the beginning of the mmap. and I don't want to explain every term of art in every function description. I think if you're reading this, you can follow the link to the struct folio description and see what an index is.