ptrace_cancel_bpt
extern int ptrace_cancel_bpt (struct task_struct *child);
ptrace_cancel_bpt(child);
if (ptrace_cancel_bpt (current)) {
if (ptrace_cancel_bpt (current)) {
unsigned long single_stepping = ptrace_cancel_bpt(current);
single_stepping |= ptrace_cancel_bpt(current);
single_stepping |= ptrace_cancel_bpt(current);
if (ptrace_cancel_bpt(current)) {