mm/gup: add folio to list when folio_isolate_lru() succeed

commit aa1e6a932ca652a50a5df458399724a80459f521 upstream.

If we call folio_isolate_lru() successfully, we will get return value 0.
We need to add this folio to the movable_pages_list.

Link: https://lkml.kernel.org/r/20230131063206.28820-1-Kuan-Ying.Lee@mediatek.com
Fixes: 67e139b02d99 ("mm/gup.c: refactor check_and_migrate_movable_pages()")
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Reviewed-by: Alistair Popple <apopple@nvidia.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Andrew Yang <andrew.yang@mediatek.com>
Cc: Chinwen Chang <chinwen.chang@mediatek.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/mm/gup.c b/mm/gup.c
index eb8d7ba..028f3b4 100644 (file)
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1978,7 +1978,7 @@ static unsigned long collect_longterm_unpinnable_pages(
                        drain_allow = false;
                }
 
-               if (!folio_isolate_lru(folio))
+               if (folio_isolate_lru(folio))
                        continue;
 
                list_add_tail(&folio->lru, movable_page_list);