linux-kernel - [PATCH v10 14/33] mm/filemap: Add folio_offset and folio_file

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Message-Id: <20210511214735.1836149-15-willy@infradead.org>
Date:   Tue, 11 May 2021 22:47:16 +0100
From:   "Matthew Wilcox (Oracle)" <willy@...radead.org>
To:     akpm@...ux-foundation.org
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Jeff Layton <jlayton@...nel.org>
Subject: [PATCH v10 14/33] mm/filemap: Add folio_offset and folio_file_offset

These are just wrappers around their page counterpart.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Reviewed-by: Christoph Hellwig <hch@....de>
Acked-by: Jeff Layton <jlayton@...nel.org>
---
 include/linux/pagemap.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 3b82252d12fc..448a2dfb5ff1 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -558,6 +558,16 @@ static inline loff_t page_file_offset(struct page *page)
 	return ((loff_t)page_index(page)) << PAGE_SHIFT;
 }
 
+static inline loff_t folio_offset(struct folio *folio)
+{
+	return page_offset(&folio->page);
+}
+
+static inline loff_t folio_file_offset(struct folio *folio)
+{
+	return page_file_offset(&folio->page);
+}
+
 extern pgoff_t linear_hugepage_index(struct vm_area_struct *vma,
 				     unsigned long address);
 
-- 
2.30.2