[PATCH v11 14/33] mm/filemap: Add folio_next_index()
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: 2021-06-14 20:25:47
Also in:
linux-fsdevel, lkml
Subsystem:
page cache, the rest · Maintainers:
Matthew Wilcox, Linus Torvalds
This helper returns the page index of the next folio in the file (ie the end of this folio, plus one). No changes to generated code. 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: Kirill A. Shutemov <redacted> Acked-by: Vlastimil Babka <redacted> Reviewed-by: William Kucharski <redacted> --- include/linux/pagemap.h | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 37a4b583abad..c5c7e061c77c 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.
--
2.30.2