diff --git a/mm/z3fold.c b/mm/z3fold.c
index 4e6814c5694fa84fd598ad8c81a52ba42dc559ae..b3b4e65c107f3b6058c3b1a4bf0cc38dec806cf4 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -1122,10 +1122,9 @@ static int z3fold_alloc(struct z3fold_pool *pool, size_t size, gfp_t gfp,
 		__SetPageMovable(page, pool->inode->i_mapping);
 		unlock_page(page);
 	} else {
-		if (trylock_page(page)) {
-			__SetPageMovable(page, pool->inode->i_mapping);
-			unlock_page(page);
-		}
+		WARN_ON(!trylock_page(page));
+		__SetPageMovable(page, pool->inode->i_mapping);
+		unlock_page(page);
 	}
 	z3fold_page_lock(zhdr);