swap_cache_alloc_folio
struct folio *swap_cache_alloc_folio(swp_entry_t target_entry, gfp_t gfp_mask,
folio = swap_cache_alloc_folio(entry, gfp, BIT(0), NULL, mpol, ilx);
folio = swap_cache_alloc_folio(entry, gfp, orders, vmf, mpol, ilx);
folio = swap_cache_alloc_folio(swpentry, GFP_KERNEL, BIT(0), NULL, mpol,