SUBARCH_SET_SINGLESTEPPING(child, on) 
SUBARCH_SET_SINGLESTEPPING(child, on); 
static inline void set_singlestepping(struct task_struct *child, int on){        if (on)                child->ptrace |= PT_DTRACE;        else                child->ptrace &= ~PT_DTRACE;        child->thread.singlestep_syscall = 0;#ifdef SUBARCH_SET_SINGLESTEPPING        SUBARCH_SET_SINGLESTEPPING(child, on)#endif                }
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/ba9950c820e556e39cd26581826b5581a64fb641/ptrace.c/buggy/arch/um/kernel/ptrace.c