linux-ext4 - [RFC v6 06/10] iomap: Add __iomap_get

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Date:   Sun,  8 Jan 2023 20:40:30 +0100
From:   Andreas Gruenbacher <agruenba@...hat.com>
To:     Christoph Hellwig <hch@...radead.org>,
        "Darrick J . Wong" <djwong@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Matthew Wilcox <willy@...radead.org>
Cc:     Andreas Gruenbacher <agruenba@...hat.com>,
        linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-ext4@...r.kernel.org, cluster-devel@...hat.com
Subject: [RFC v6 06/10] iomap: Add __iomap_get_folio helper

Add an __iomap_get_folio() helper as the counterpart of the existing
__iomap_put_folio() helper.  Use the new helper in iomap_write_begin().
Not a functional change.

Signed-off-by: Andreas Gruenbacher <agruenba@...hat.com>
---
 fs/iomap/buffered-io.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 418519dea2ce..666107c3a385 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -602,6 +602,17 @@ static int __iomap_write_begin(const struct iomap_iter *iter, loff_t pos,
 	return 0;
 }
 
+static struct folio *__iomap_get_folio(struct iomap_iter *iter, loff_t pos,
+		size_t len)
+{
+	const struct iomap_page_ops *page_ops = iter->iomap.page_ops;
+
+	if (page_ops && page_ops->page_prepare)
+		return page_ops->page_prepare(iter, pos, len);
+	else
+		return iomap_get_folio(iter, pos);
+}
+
 static void __iomap_put_folio(struct iomap_iter *iter, loff_t pos, size_t ret,
 		struct folio *folio)
 {
@@ -642,10 +653,7 @@ static int iomap_write_begin(struct iomap_iter *iter, loff_t pos,
 	if (!mapping_large_folio_support(iter->inode->i_mapping))
 		len = min_t(size_t, len, PAGE_SIZE - offset_in_page(pos));
 
-	if (page_ops && page_ops->page_prepare)
-		folio = page_ops->page_prepare(iter, pos, len);
-	else
-		folio = iomap_get_folio(iter, pos);
+	folio = __iomap_get_folio(iter, pos, len);
 	if (IS_ERR(folio))
 		return PTR_ERR(folio);
 
-- 
2.38.1