linux-kernel - [PATCH v13 102/137] iomap: Convert iomap_read_inline

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Date:   Mon, 12 Jul 2021 04:06:26 +0100
From:   "Matthew Wilcox (Oracle)" <willy@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        linux-mm@...ck.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH v13 102/137] iomap: Convert iomap_read_inline_data to take a folio

Inline data is restricted to being less than a page in size, so we
don't need to handle multi-page folios.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
 fs/iomap/buffered-io.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 1df401c6e55a..aec28781c773 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -194,24 +194,24 @@ struct iomap_readpage_ctx {
 	struct readahead_control *rac;
 };
 
-static void
-iomap_read_inline_data(struct inode *inode, struct page *page,
+static void iomap_read_inline_data(struct inode *inode, struct folio *folio,
 		struct iomap *iomap)
 {
 	size_t size = i_size_read(inode);
 	void *addr;
 
-	if (PageUptodate(page))
+	if (folio_uptodate(folio))
 		return;
 
-	BUG_ON(page->index);
+	BUG_ON(folio->index);
+	BUG_ON(folio_multi(folio));
 	BUG_ON(size > PAGE_SIZE - offset_in_page(iomap->inline_data));
 
-	addr = kmap_atomic(page);
+	addr = kmap_local_folio(folio, 0);
 	memcpy(addr, iomap->inline_data, size);
 	memset(addr + size, 0, PAGE_SIZE - size);
-	kunmap_atomic(addr);
-	SetPageUptodate(page);
+	kunmap_local(addr);
+	folio_mark_uptodate(folio);
 }
 
 static inline bool iomap_block_needs_zeroing(struct inode *inode,
@@ -236,7 +236,7 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
 
 	if (iomap->type == IOMAP_INLINE) {
 		WARN_ON_ONCE(pos);
-		iomap_read_inline_data(inode, &folio->page, iomap);
+		iomap_read_inline_data(inode, folio, iomap);
 		return PAGE_SIZE;
 	}
 
@@ -614,7 +614,7 @@ static int iomap_write_begin(struct inode *inode, loff_t pos, size_t len,
 
 	page = folio_file_page(folio, pos >> PAGE_SHIFT);
 	if (srcmap->type == IOMAP_INLINE)
-		iomap_read_inline_data(inode, page, srcmap);
+		iomap_read_inline_data(inode, folio, srcmap);
 	else if (iomap->flags & IOMAP_F_BUFFER_HEAD)
 		status = __block_write_begin_int(page, pos, len, NULL, srcmap);
 	else
-- 
2.30.2