PG_arch_2
#define PG_mte_tagged PG_arch_2
#define _PGMT_UC_MINUS (1UL << PG_arch_2)
#define _PGMT_WT (1UL << PG_arch_2 | 1UL << PG_arch_1)
#define _PGMT_MASK (1UL << PG_arch_2 | 1UL << PG_arch_1)
u |= kpf_copy_bit(k, KPF_ARCH_2, PG_arch_2);
(1L << PG_arch_2) |