ntfs3: Convert ntfs_read_folio to use a folio

Remove the struct page conversion, and use a folio throughout.  We still
convert back to a struct page for calling some internal functions,
but those will change soon.

Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Signed-off-by: Konstantin Komarov <[email protected]>

Author: Matthew Wilcox (Oracle)

fs/ntfs3/inode.c

@@ -710,25 +710,24 @@ static sector_t ntfs_bmap(struct address_space *mapping, sector_t block)
 
 static int ntfs_read_folio(struct file *file, struct folio *folio)
 {
-	struct page *page = &folio->page;
 	int err;
-	struct address_space *mapping = page->mapping;
+	struct address_space *mapping = folio->mapping;
 	struct inode *inode = mapping->host;
 	struct ntfs_inode *ni = ntfs_i(inode);
 
 	if (is_resident(ni)) {
 		ni_lock(ni);
-		err = attr_data_read_resident(ni, page);
+		err = attr_data_read_resident(ni, &folio->page);
 		ni_unlock(ni);
 		if (err != E_NTFS_NONRESIDENT) {
-			unlock_page(page);
+			folio_unlock(folio);
 			return err;
 		}
 	}
 
 	if (is_compressed(ni)) {
 		ni_lock(ni);
-		err = ni_readpage_cmpr(ni, page);
+		err = ni_readpage_cmpr(ni, &folio->page);
 		ni_unlock(ni);
 		return err;
 	}