_TIF_SPEC_IB
return (tifn & _TIF_SPEC_IB) >> (TIF_SPEC_IB - SPEC_CTRL_STIBP_SHIFT);
# define _TIF_WORK_CTXSW (_TIF_WORK_CTXSW_BASE | _TIF_SPEC_IB)
updmsr |= !!(tif_diff & _TIF_SPEC_IB);
prev_tif &= ~_TIF_SPEC_IB;
next_tif &= ~_TIF_SPEC_IB;