fs: Add aops->dirty_folio

This replaces ->set_page_dirty().  It returns a bool instead of an int
and takes the address_space as a parameter instead of expecting the
implementations to retrieve the address_space from the page.  This is
particularly important for filesystems which use FS_OPS for swap.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Tested-by: Mike Marshall <hubcap@omnibond.com> # orangefs
Tested-by: David Howells <dhowells@redhat.com> # afs

1 files changed, 4 insertions, 1 deletions

diff --git a/mm/page_io.c b/mm/page_io.c
index 0bf8e40f4e57..24c975fb4e21 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -444,9 +444,12 @@ int swap_set_page_dirty(struct page *page)
 
 	if (data_race(sis->flags & SWP_FS_OPS)) {
 		struct address_space *mapping = sis->swap_file->f_mapping;
+		const struct address_space_operations *aops = mapping->a_ops;
 
 		VM_BUG_ON_PAGE(!PageSwapCache(page), page);
-		return mapping->a_ops->set_page_dirty(page);
+		if (aops->dirty_folio)
+			return aops->dirty_folio(mapping, page_folio(page));
+		return aops->set_page_dirty(page);
 	} else {
 		return __set_page_dirty_no_writeback(page);
 	}