truncate: Add invalidate_complete_folio2()

Convert invalidate_complete_page2() to invalidate_complete_folio2().
Use filemap_free_folio() to free the page instead of calling ->freepage
manually.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>

mm/filemap.c

@@ -229,8 +229,7 @@ void __filemap_remove_folio(struct folio *folio, void *shadow)
 	page_cache_delete(mapping, folio, shadow);
 }
 
-static void filemap_free_folio(struct address_space *mapping,
-				struct folio *folio)
+void filemap_free_folio(struct address_space *mapping, struct folio *folio)
 {
 	void (*freepage)(struct page *);
 

mm/internal.h

@@ -92,6 +92,7 @@ static inline void force_page_cache_readahead(struct address_space *mapping,
 
 unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
 		pgoff_t end, struct pagevec *pvec, pgoff_t *indices);
+void filemap_free_folio(struct address_space *mapping, struct folio *folio);
 int truncate_inode_folio(struct address_space *mapping, struct folio *folio);
 
 /**

mm/truncate.c

@@ -571,31 +571,29 @@ void invalidate_mapping_pagevec(struct address_space *mapping,
  * shrink_page_list() has a temp ref on them, or because they're transiently
  * sitting in the lru_cache_add() pagevecs.
  */
-static int
-invalidate_complete_page2(struct address_space *mapping, struct page *page)
+static int invalidate_complete_folio2(struct address_space *mapping,
+					struct folio *folio)
 {
-	if (page->mapping != mapping)
+	if (folio->mapping != mapping)
 		return 0;
 
-	if (page_has_private(page) && !try_to_release_page(page, GFP_KERNEL))
+	if (folio_has_private(folio) &&
+	    !filemap_release_folio(folio, GFP_KERNEL))
 		return 0;
 
 	spin_lock(&mapping->host->i_lock);
 	xa_lock_irq(&mapping->i_pages);
-	if (PageDirty(page))
+	if (folio_test_dirty(folio))
 		goto failed;
 
-	BUG_ON(page_has_private(page));
-	__delete_from_page_cache(page, NULL);
+	BUG_ON(folio_has_private(folio));
+	__filemap_remove_folio(folio, NULL);
 	xa_unlock_irq(&mapping->i_pages);
 	if (mapping_shrinkable(mapping))
 		inode_add_lru(mapping->host);
 	spin_unlock(&mapping->host->i_lock);
 
-	if (mapping->a_ops->freepage)
-		mapping->a_ops->freepage(page);
-
-	put_page(page);	/* pagecache ref */
+	filemap_free_folio(mapping, folio);
 	return 1;
 failed:
 	xa_unlock_irq(&mapping->i_pages);
@@ -679,8 +677,7 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
 
 			ret2 = do_launder_page(mapping, &folio->page);
 			if (ret2 == 0) {
-				if (!invalidate_complete_page2(mapping,
-								&folio->page))
+				if (!invalidate_complete_folio2(mapping, folio))
 					ret2 = -EBUSY;
 			}
 			if (ret2 < 0)