Re: [PATCH v14 014/138] mm/filemap: Add folio_next_index()
From: Mike Rapoport <rppt@kernel.org>
Date: 2021-07-20 10:42:55
Also in:
linux-fsdevel, lkml
On Thu, Jul 15, 2021 at 04:35:00AM +0100, 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). 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> Reviewed-by: David Howells <dhowells@redhat.com> --- include/linux/pagemap.h | 11 +++++++++++ 1 file changed, 11 insertions(+)
Acked-by: Mike Rapoport <redacted>
quoted hunk ↗ jump to hunk
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?
+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
-- Sincerely yours, Mike.