We must provide a_ops->dirty_folio and invalidate_folio.

In v5.17-rc4-53-g3a3bae50af5d, we can no longer omit having this
method unhooked as the mm caller blindly calls it now. In-kernel
filesystems all were fixed in this change.

aops->invalidatepage was the old aops method that would free pages
with private attached data. This method is replaced with the
new invalidate_folio method. If this method is NULL, the memory
will become orphaned. (v5.17-rc4-29-gf50015a596fa)

Signed-off-by: Auke Kok <auke.kok@versity.com>

kmod/src/data.c

@@ -1916,6 +1916,8 @@ int scoutfs_data_waiting(struct super_block *sb, u64 ino, u64 iblock,
 
 const struct address_space_operations scoutfs_file_aops = {
 #ifdef KC_MPAGE_READ_FOLIO
+	.dirty_folio		= block_dirty_folio,
+	.invalidate_folio	= block_invalidate_folio,
 	.read_folio		= scoutfs_read_folio,
 #else
 	.readpage		= scoutfs_readpage,