ASID               27 arch/arm/include/asm/mmu.h #define ASID(mm)	((unsigned int)((mm)->context.id.counter & ~ASID_MASK))
ASID               29 arch/arm/include/asm/mmu.h #define ASID(mm)	(0)
ASID               30 arch/arm64/include/asm/mmu.h #define ASID(mm)	((mm)->context.id.counter & 0xffff)