From: Miaohe Lin Subject: mm/z3fold: remove unneeded page_mapcount_reset and ClearPagePrivate Page->page_type and PagePrivate are not used in z3fold. We should remove these confusing unneeded operations. The z3fold do these here is due to referring to zsmalloc's migration code which does need these operations. Link: https://lkml.kernel.org/r/20220308134311.59086-5-linmiaohe@huawei.com Signed-off-by: Miaohe Lin Reviewed-by: Vitaly Wool Signed-off-by: Andrew Morton --- mm/z3fold.c | 3 --- 1 file changed, 3 deletions(-) --- a/mm/z3fold.c~mm-z3fold-remove-unneeded-page_mapcount_reset-and-clearpageprivate +++ a/mm/z3fold.c @@ -420,7 +420,6 @@ static void free_z3fold_page(struct page __ClearPageMovable(page); unlock_page(page); } - ClearPagePrivate(page); __free_page(page); } @@ -1635,7 +1634,6 @@ static int z3fold_page_migrate(struct ad INIT_LIST_HEAD(&new_zhdr->buddy); new_mapping = page_mapping(page); __ClearPageMovable(page); - ClearPagePrivate(page); get_page(newpage); z3fold_page_lock(new_zhdr); @@ -1655,7 +1653,6 @@ static int z3fold_page_migrate(struct ad queue_work_on(new_zhdr->cpu, pool->compact_wq, &new_zhdr->work); - page_mapcount_reset(page); clear_bit(PAGE_CLAIMED, &page->private); put_page(page); return 0; _