TIF_SPEC_L1D_FLUSH
#define _TIF_SPEC_L1D_FLUSH BIT(TIF_SPEC_L1D_FLUSH)
set_ti_thread_flag(&task->thread_info, TIF_SPEC_L1D_FLUSH);
clear_ti_thread_flag(&task->thread_info, TIF_SPEC_L1D_FLUSH);
if (test_ti_thread_flag(&task->thread_info, TIF_SPEC_L1D_FLUSH))
clear_ti_thread_flag(&next->thread_info, TIF_SPEC_L1D_FLUSH);
BUILD_BUG_ON(TIF_SPEC_L1D_FLUSH != TIF_SPEC_IB + 1);