pte_file 57 include/linux/swapops.h return !pte_none(pte) && !pte_present_nonuma(pte) && !pte_file(pte); pte_file 69 include/linux/swapops.h BUG_ON(pte_file(pte)); pte_file 85 include/linux/swapops.h BUG_ON(pte_file(__swp_entry_to_pte(arch_entry)));