TIF_UPROBE_SINGLESTEP
#define _TIF_UPROBE_SINGLESTEP BIT(TIF_UPROBE_SINGLESTEP)
if (test_tsk_thread_flag(task, TIF_UPROBE_SINGLESTEP))
test_tsk_thread_flag(task, TIF_UPROBE_SINGLESTEP)) {
clear_thread_flag(TIF_UPROBE_SINGLESTEP);
set_tsk_thread_flag(current, TIF_UPROBE_SINGLESTEP);
clear_tsk_thread_flag(current, TIF_UPROBE_SINGLESTEP);