if (current->flags & PF_FREEZE) { refrigerator(0); 
if (try_to_freeze()) 
int do_signal(struct pt_regs *regs, sigset_t *oldset){	siginfo_t info;	int signr;	struct k_sigaction ka;	unsigned short inst;	/*	 * We want the common case to go fast, which	 * is why we may in certain cases get here from	 * kernel mode. Just return without doing anything	 * if so.	 */	if (!user_mode(regs))		return 1;	if (current->flags & PF_FREEZE) {		refrigerator(0);		goto no_signal;	}	if (!oldset)		oldset = &current->blocked;	signr = get_signal_to_deliver(&info, &ka, regs, NULL);	if (signr > 0) {		/* Reenable any watchpoints before delivering the		 * signal to user space. The processor register will		 * have been cleared if the watchpoint triggered		 * inside the kernel.		 */		/* Whee!  Actually deliver the signal.  */		handle_signal(signr, &ka, &info, oldset, regs);		return 1;	} no_signal:	/* Did we come from a system call? */	if (regs->syscall_nr >= 0) {		/* Restart the system call - no handlers present */		if (regs->r0 == -ERESTARTNOHAND ||		    regs->r0 == -ERESTARTSYS ||		    regs->r0 == -ERESTARTNOINTR) {			regs->r0 = regs->orig_r0;			inst = *(unsigned short *)(regs->bpc - 2);			if ((inst & 0xfff0) == 0x10f0)	/* trap ? */				regs->bpc -= 2;			else				regs->bpc -= 4;		}		if (regs->r0 == -ERESTART_RESTARTBLOCK){			regs->r0 = regs->orig_r0;			regs->r7 = __NR_restart_syscall;			inst = *(unsigned short *)(regs->bpc - 2);			if ((inst & 0xfff0) == 0x10f0)	/* trap ? */				regs->bpc -= 2;			else				regs->bpc -= 4;		}	}	return 0;}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/3e1d1d28d99dabe63c64f7f40f1ca1d646de1f73/signal.c/clean/arch/m32r/kernel/signal.c