TIF_ISOLATE_BP_GUEST
#define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST)
guest_bp_isolation = test_thread_flag(TIF_ISOLATE_BP_GUEST);
set_thread_flag(TIF_ISOLATE_BP_GUEST);
clear_thread_flag(TIF_ISOLATE_BP_GUEST);