Re: [PATCH v10 13/33] mm/filemap: Add folio_next_index
From: Vlastimil Babka <hidden>
Date: 2021-05-14 17:07:27
Also in:
linux-fsdevel, lkml
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 <redacted>
quoted hunk ↗ jump to hunk
--- 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.