TTM_PAGE_FLAG_SWAPPED
if (unlikely(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)) {
if (unlikely(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)) {
ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;
ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;