65 	return t->sighand->action[sig - 1].sa.sa_handler;  in sig_handler()
507 		t->sighand->action[i].sa.sa_handler = SIG_IGN;  in ignore_signals()
522 		if (force_default || ka->sa.sa_handler != SIG_IGN)  in flush_signal_handlers()
523 			ka->sa.sa_handler = SIG_DFL;  in flush_signal_handlers()
535 	void __user *handler = tsk->sighand->action[sig-1].sa.sa_handler;  in unhandled_signal()
1238 	ignored = action->sa.sa_handler == SIG_IGN;  in force_sig_info()
1241 		action->sa.sa_handler = SIG_DFL;  in force_sig_info()
1251 	if (action->sa.sa_handler == SIG_DFL && !t->ptrace)  in force_sig_info()
1521 		p->sighand->action[sig - 1].sa.sa_handler = SIG_DFL;  in force_sigsegv()
1825 	    (psig->action[SIGCHLD-1].sa.sa_handler == SIG_IGN ||  in do_notify_parent()
1843 		if (psig->action[SIGCHLD-1].sa.sa_handler == SIG_IGN)  in do_notify_parent()
1915 	if (sighand->action[SIGCHLD-1].sa.sa_handler != SIG_IGN &&  in do_notify_parent_cldstop()
2422 		if (ka->sa.sa_handler == SIG_IGN) /* Do nothing.  */  in get_signal()
2424 		if (ka->sa.sa_handler != SIG_DFL) {  in get_signal()
2429 				ka->sa.sa_handler = SIG_DFL;  in get_signal()
3397 	current->sighand->action[sig - 1].sa.sa_handler = action;  in kernel_sigaction()
3734 		ret = get_user(handler, &act->sa_handler);  in COMPAT_SYSCALL_DEFINE4()
3735 		new_ka.sa.sa_handler = compat_ptr(handler);  in COMPAT_SYSCALL_DEFINE4()
3748 		ret = put_user(ptr_to_compat(old_ka.sa.sa_handler),   in COMPAT_SYSCALL_DEFINE4()
3749 			       &oact->sa_handler);  in COMPAT_SYSCALL_DEFINE4()
3774 		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||  in SYSCALL_DEFINE3()
3789 		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||  in SYSCALL_DEFINE3()
3811 		    __get_user(handler, &act->sa_handler) ||  in COMPAT_SYSCALL_DEFINE3()
3820 		new_ka.sa.sa_handler = compat_ptr(handler);  in COMPAT_SYSCALL_DEFINE3()
3829 		    __put_user(ptr_to_compat(old_ka.sa.sa_handler),  in COMPAT_SYSCALL_DEFINE3()
3830 			       &oact->sa_handler) ||  in COMPAT_SYSCALL_DEFINE3()
3873 	new_sa.sa.sa_handler = handler;  in SYSCALL_DEFINE2()
3879 	return ret ? ret : (unsigned long)old_sa.sa.sa_handler;  in SYSCALL_DEFINE2()