if (try_to_freeze(0)) 
if (try_to_freeze()) 
int do_signal(struct pt_regs *regs, sigset_t *oldset){	siginfo_t info;	int signr;	struct k_sigaction ka;	/*	 * 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 (try_to_freeze(0))		goto no_signal;	if (!oldset)		oldset = &current->blocked;	signr = get_signal_to_deliver(&info, &ka, regs, NULL);	if (signr > 0) {		/* 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->tra >= 0) {		/* Restart the system call - no handlers present */		if (regs->regs[0] == -ERESTARTNOHAND ||		    regs->regs[0] == -ERESTARTSYS ||		    regs->regs[0] == -ERESTARTNOINTR ||		    regs->regs[0] == -ERESTART_RESTARTBLOCK) {			regs->pc -= 2;		}	}	return 0;}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/0e6c1f5facffd94000832d402be1ea75f73c90e3/signal.c/clean/arch/sh/kernel/signal.c