linux-kernel - [PATCH v3 18/25] iomap: Convert iomap_write_end

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Date:   Thu, 16 Dec 2021 21:07:08 +0000
From:   "Matthew Wilcox (Oracle)" <willy@...radead.org>
To:     "Darrick J. Wong" <djwong@...nel.org>
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>
Subject: [PATCH v3 18/25] iomap: Convert iomap_write_end_inline to take a folio

This conversion is only safe because iomap only supports writes to inline
data which starts at the beginning of the file.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Reviewed-by: Darrick J. Wong <djwong@...nel.org>
Reviewed-by: Christoph Hellwig <hch@....de>
---
 fs/iomap/buffered-io.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 975a4a6aeca0..b2bf7f337e75 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -683,16 +683,16 @@ static size_t __iomap_write_end(struct inode *inode, loff_t pos, size_t len,
 }
 
 static size_t iomap_write_end_inline(const struct iomap_iter *iter,
-		struct page *page, loff_t pos, size_t copied)
+		struct folio *folio, loff_t pos, size_t copied)
 {
 	const struct iomap *iomap = &iter->iomap;
 	void *addr;
 
-	WARN_ON_ONCE(!PageUptodate(page));
+	WARN_ON_ONCE(!folio_test_uptodate(folio));
 	BUG_ON(!iomap_inline_data_valid(iomap));
 
-	flush_dcache_page(page);
-	addr = kmap_local_page(page) + pos;
+	flush_dcache_folio(folio);
+	addr = kmap_local_folio(folio, pos);
 	memcpy(iomap_inline_data(iomap, pos), addr, copied);
 	kunmap_local(addr);
 
@@ -710,7 +710,7 @@ static size_t iomap_write_end(struct iomap_iter *iter, loff_t pos, size_t len,
 	size_t ret;
 
 	if (srcmap->type == IOMAP_INLINE) {
-		ret = iomap_write_end_inline(iter, &folio->page, pos, copied);
+		ret = iomap_write_end_inline(iter, folio, pos, copied);
 	} else if (srcmap->flags & IOMAP_F_BUFFER_HEAD) {
 		ret = block_write_end(NULL, iter->inode->i_mapping, pos, len,
 				copied, &folio->page, NULL);
-- 
2.33.0