pgd_none
#define pgd_none(pgd) (0)
#define pgd_none(pgd) (pgtable_l5_enabled() && !pgd_val(pgd))
#define pgd_none(pgd) (0)
static inline int pgd_none(pgd_t pgd)
static inline int pgd_none(pgd_t pgd)
static inline int pgd_none(pgd_t pgd)
static inline int pgd_none(pgd_t pgd) { return 0; }