nilfs2: convert to __nilfs_clear_folio_dirty()

All callers now have a folio, so convert to pass a folio.  No caller uses
the return value, so make it return void.  Removes a couple of hidden
calls to compound_head().

Link: https://lkml.kernel.org/r/20231114084436.2755-10-konishi.ryusuke@gmail.comSigned-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>

fs/nilfs2/page.c

@@ -82,7 +82,7 @@ void nilfs_forget_buffer(struct buffer_head *bh)
 	lock_buffer(bh);
 	set_mask_bits(&bh->b_state, clear_bits, 0);
 	if (nilfs_folio_buffers_clean(folio))
-		__nilfs_clear_page_dirty(&folio->page);
+		__nilfs_clear_folio_dirty(folio);
 
 	bh->b_blocknr = -1;
 	folio_clear_uptodate(folio);
@@ -428,7 +428,7 @@ void nilfs_clear_folio_dirty(struct folio *folio, bool silent)
 		} while (bh = bh->b_this_page, bh != head);
 	}
 
-	__nilfs_clear_page_dirty(&folio->page);
+	__nilfs_clear_folio_dirty(folio);
 }
 
 unsigned int nilfs_page_count_clean_buffers(struct page *page,
@@ -458,22 +458,23 @@ unsigned int nilfs_page_count_clean_buffers(struct page *page,
  * 2) Some B-tree operations like insertion or deletion may dispose buffers
  *    in dirty state, and this needs to cancel the dirty state of their pages.
  */
-int __nilfs_clear_page_dirty(struct page *page)
+void __nilfs_clear_folio_dirty(struct folio *folio)
 {
-	struct address_space *mapping = page->mapping;
+	struct address_space *mapping = folio->mapping;
 
 	if (mapping) {
 		xa_lock_irq(&mapping->i_pages);
-		if (test_bit(PG_dirty, &page->flags)) {
-			__xa_clear_mark(&mapping->i_pages, page_index(page),
+		if (folio_test_dirty(folio)) {
+			__xa_clear_mark(&mapping->i_pages, folio->index,
 					     PAGECACHE_TAG_DIRTY);
 			xa_unlock_irq(&mapping->i_pages);
-			return clear_page_dirty_for_io(page);
+			folio_clear_dirty_for_io(folio);
+			return;
 		}
 		xa_unlock_irq(&mapping->i_pages);
-		return 0;
+		return;
 	}
-	return TestClearPageDirty(page);
+	folio_clear_dirty(folio);
 }
 
 /**

fs/nilfs2/page.h

@@ -30,7 +30,7 @@ BUFFER_FNS(NILFS_Checked, nilfs_checked)	/* buffer is verified */
 BUFFER_FNS(NILFS_Redirected, nilfs_redirected)	/* redirected to a copy */
 
 
-int __nilfs_clear_page_dirty(struct page *);
+void __nilfs_clear_folio_dirty(struct folio *);
 
 struct buffer_head *nilfs_grab_buffer(struct inode *, struct address_space *,
 				      unsigned long, unsigned long);

fs/nilfs2/segment.c

@@ -1760,7 +1760,7 @@ static void nilfs_end_folio_io(struct folio *folio, int err)
 			 */
 			folio_lock(folio);
 			if (nilfs_folio_buffers_clean(folio))
-				__nilfs_clear_page_dirty(&folio->page);
+				__nilfs_clear_folio_dirty(folio);
 			folio_unlock(folio);
 		}
 		return;