FP_XSTATE_MAGIC1
sw_bytes->magic1 = FP_XSTATE_MAGIC1;
if (fx_sw->magic1 != FP_XSTATE_MAGIC1)
if (res->sw_reserved.magic1 != FP_XSTATE_MAGIC1) {
__put_user(FP_XSTATE_MAGIC1, &to_fp64->fpstate.sw_reserved.magic1);
if (sw_bytes->magic1 == FP_XSTATE_MAGIC1)