[PATCH 06/20] nilfs2: Convert nilfs_writepage() to use a folio

[Ryusuke Konishi <konishi.ryusuke@gmail.com>]

From: "Matthew Wilcox (Oracle)" <willy@infradead.org>

Convert the incoming page to a folio.  Replaces three calls to
compound_head() with one.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
---
 fs/nilfs2/inode.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index f861f3a0bf5c..c7ec56358a79 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -175,7 +175,8 @@ static int nilfs_writepages(struct address_space *mapping,
 
 static int nilfs_writepage(struct page *page, struct writeback_control *wbc)
 {
-	struct inode *inode = page->mapping->host;
+	struct folio *folio = page_folio(page);
+	struct inode *inode = folio->mapping->host;
 	int err;
 
 	if (sb_rdonly(inode->i_sb)) {
@@ -186,12 +187,12 @@ static int nilfs_writepage(struct page *page, struct writeback_control *wbc)
 		 * So, here we simply discard this dirty page.
 		 */
 		nilfs_clear_dirty_page(page, false);
-		unlock_page(page);
+		folio_unlock(folio);
 		return -EROFS;
 	}
 
-	redirty_page_for_writepage(wbc, page);
-	unlock_page(page);
+	folio_redirty_for_writepage(wbc, folio);
+	folio_unlock(folio);
 
 	if (wbc->sync_mode == WB_SYNC_ALL) {
 		err = nilfs_construct_segment(inode->i_sb);
-- 
2.34.1