CPU_ID_VARIANT_MASK
variant = __SHIFTOUT(cpuid, CPU_ID_VARIANT_MASK);
__SHIFTOUT(ci->ci_id.ac_midr, CPU_ID_VARIANT_MASK));
__SHIFTIN(__SHIFTOUT(lcputype, CPU_ID_VARIANT_MASK), __BITS(7,4)) |
#define CPU_ID_PXA_MASK (CPU_ID_IMPLEMENTOR_MASK|CPU_ID_VARIANT_MASK|\
variant = __SHIFTOUT(cpuid, CPU_ID_VARIANT_MASK);