| Message ID | 20210511214735.1836149-14-willy@infradead.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Memory folios | expand |
On 5/11/21 11:47 PM, Matthew Wilcox (Oracle) wrote: > This helper returns the page index of the next folio in the file (ie > the end of this folio, plus one). > > Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> > Reviewed-by: Christoph Hellwig <hch@lst.de> > Acked-by: Jeff Layton <jlayton@kernel.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> > --- > include/linux/pagemap.h | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h > index 8eaeffccfd38..3b82252d12fc 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. > + */ > +static inline pgoff_t folio_next_index(struct folio *folio) > +{ > + return folio->index + folio_nr_pages(folio); > +} > + > /** > * folio_file_page - The page for a particular index. > * @folio: The folio which contains this index. >
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 8eaeffccfd38..3b82252d12fc 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. + */ +static inline pgoff_t folio_next_index(struct folio *folio) +{ + return folio->index + folio_nr_pages(folio); +} + /** * folio_file_page - The page for a particular index. * @folio: The folio which contains this index.