[PATCH 18/19] iomap: Convert iomap_writepages() to use for_each_writeback_folio()

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From: Matthew Wilcox <willy@xxxxxxxxxxxxx>

This removes one indirect function call per folio, and adds typesafety
by not casting through a void pointer.

Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 fs/iomap/buffered-io.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 093c4515b22a53..58b3661f5eac9e 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -1887,9 +1887,8 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc,
  * regular allocated space.
  */
 static int iomap_do_writepage(struct folio *folio,
-		struct writeback_control *wbc, void *data)
+		struct writeback_control *wbc, struct iomap_writepage_ctx *wpc)
 {
-	struct iomap_writepage_ctx *wpc = data;
 	struct inode *inode = folio->mapping->host;
 	u64 end_pos, isize;
 
@@ -1986,10 +1985,12 @@ iomap_writepages(struct address_space *mapping, struct writeback_control *wbc,
 		struct iomap_writepage_ctx *wpc,
 		const struct iomap_writeback_ops *ops)
 {
-	int			ret;
+	struct folio *folio;
+	int ret;
 
 	wpc->ops = ops;
-	ret = write_cache_pages(mapping, wbc, iomap_do_writepage, wpc);
+	for_each_writeback_folio(mapping, wbc, folio, ret)
+		ret = iomap_do_writepage(folio, wbc, wpc);
 	if (!wpc->ioend)
 		return ret;
 	return iomap_submit_ioend(wpc, wpc->ioend, ret);
-- 
2.39.2





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