L_PTE_MT_MASK     171 arch/arm/include/asm/pgtable-2level.h #define L_PTE_MT_MASK		(_AT(pteval_t, 0x0f) << 2)
L_PTE_MT_MASK     100 arch/arm/include/asm/pgtable-3level.h #define L_PTE_MT_MASK		(_AT(pteval_t, 7) << 2)