69 	return t->sighand->action[sig - 1].sa.sa_handler;  in sig_handler()
529 		t->sighand->action[i].sa.sa_handler = SIG_IGN;  in ignore_signals()
544 		if (force_default || ka->sa.sa_handler != SIG_IGN)  in flush_signal_handlers()
545 			ka->sa.sa_handler = SIG_DFL;  in flush_signal_handlers()
557 	void __user *handler = tsk->sighand->action[sig-1].sa.sa_handler;  in unhandled_signal()
1319 	ignored = action->sa.sa_handler == SIG_IGN;  in force_sig_info_to_task()
1322 		action->sa.sa_handler = SIG_DFL;  in force_sig_info_to_task()
1332 	if (action->sa.sa_handler == SIG_DFL && !t->ptrace)  in force_sig_info_to_task()
1647 		p->sighand->action[sig - 1].sa.sa_handler = SIG_DFL;  in force_sigsegv()
1972 	    (psig->action[SIGCHLD-1].sa.sa_handler == SIG_IGN ||  in do_notify_parent()
1990 		if (psig->action[SIGCHLD-1].sa.sa_handler == SIG_IGN)  in do_notify_parent()
2066 	if (sighand->action[SIGCHLD-1].sa.sa_handler != SIG_IGN &&  in do_notify_parent_cldstop()
2664 		if (ka->sa.sa_handler == SIG_IGN) /* Do nothing.  */  in get_signal()
2666 		if (ka->sa.sa_handler != SIG_DFL) {  in get_signal()
2671 				ka->sa.sa_handler = SIG_DFL;  in get_signal()
3953 	current->sighand->action[sig - 1].sa.sa_handler = action;  in kernel_sigaction()
4294 		ret = get_user(handler, &act->sa_handler);  in COMPAT_SYSCALL_DEFINE4()
4295 		new_ka.sa.sa_handler = compat_ptr(handler);  in COMPAT_SYSCALL_DEFINE4()
4308 		ret = put_user(ptr_to_compat(old_ka.sa.sa_handler),   in COMPAT_SYSCALL_DEFINE4()
4309 			       &oact->sa_handler);  in COMPAT_SYSCALL_DEFINE4()
4334 		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||  in SYSCALL_DEFINE3()
4349 		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||  in SYSCALL_DEFINE3()
4371 		    __get_user(handler, &act->sa_handler) ||  in COMPAT_SYSCALL_DEFINE3()
4380 		new_ka.sa.sa_handler = compat_ptr(handler);  in COMPAT_SYSCALL_DEFINE3()
4389 		    __put_user(ptr_to_compat(old_ka.sa.sa_handler),  in COMPAT_SYSCALL_DEFINE3()
4390 			       &oact->sa_handler) ||  in COMPAT_SYSCALL_DEFINE3()
4433 	new_sa.sa.sa_handler = handler;  in SYSCALL_DEFINE2()
4439 	return ret ? ret : (unsigned long)old_sa.sa.sa_handler;  in SYSCALL_DEFINE2()