gfs2: Set .migrate_folio in gfs2_{rgrp,meta}_aops

[ Upstream commit 5c8f12c ]

Clears up the warning added in 7ee3647 ("migrate: Remove call to
->writepage") that occurs in various xfstests, causing "something found
in dmesg" failures.

[  341.136573] gfs2_meta_aops does not implement migrate_folio
[  341.136953] WARNING: CPU: 1 PID: 36 at mm/migrate.c:944 move_to_new_folio+0x2f8/0x300

Signed-off-by: Andrew Price <anprice@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 9d9b053f7f9c5a35049abe56af9e6ac70b6b0e4b)

Author: andyprice

fs/gfs2/meta_io.c

@@ -103,13 +103,15 @@ const struct address_space_operations gfs2_meta_aops = {
 	.invalidate_folio = block_invalidate_folio,
 	.writepages = gfs2_aspace_writepages,
 	.release_folio = gfs2_release_folio,
+	.migrate_folio = buffer_migrate_folio_norefs,
 };
 
 const struct address_space_operations gfs2_rgrp_aops = {
 	.dirty_folio	= block_dirty_folio,
 	.invalidate_folio = block_invalidate_folio,
 	.writepages = gfs2_aspace_writepages,
 	.release_folio = gfs2_release_folio,
+	.migrate_folio = buffer_migrate_folio_norefs,
 };
 
 /**