NUM_USER_ASIDS     40 arch/arm/mm/context.c #define NUM_USER_ASIDS		ASID_FIRST_VERSION
NUM_USER_ASIDS     33 arch/arm64/mm/context.c #define NUM_USER_ASIDS		(ASID_FIRST_VERSION >> 1)
NUM_USER_ASIDS     37 arch/arm64/mm/context.c #define NUM_USER_ASIDS		(ASID_FIRST_VERSION)