nilfs2: convert nilfs_mdt_write_page() to use a folio

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

Link: https://lkml.kernel.org/r/20231114084436.2755-8-konishi.ryusuke@gmail.com
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index c97c77a3966817c060e173aa1b9f9fa2b16de37d..327408512b869d8b8cecbab39e62460f34d9caec 100644 (file)
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -399,7 +399,8 @@ int nilfs_mdt_fetch_dirty(struct inode *inode)
 static int
 nilfs_mdt_write_page(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;
        struct super_block *sb;
        int err = 0;
 
@@ -407,16 +408,16 @@ nilfs_mdt_write_page(struct page *page, struct writeback_control *wbc)
                /*
                 * It means that filesystem was remounted in read-only
                 * mode because of error or metadata corruption. But we
-                * have dirty pages that try to be flushed in background.
-                * So, here we simply discard this dirty page.
+                * have dirty folios that try to be flushed in background.
+                * So, here we simply discard this dirty folio.
                 */
                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 (!inode)
                return 0;