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()
1322 	ignored = action->sa.sa_handler == SIG_IGN;  in force_sig_info_to_task()
1325 		action->sa.sa_handler = SIG_DFL;  in force_sig_info_to_task()
1335 	if (action->sa.sa_handler == SIG_DFL && !t->ptrace)  in force_sig_info_to_task()
1665 		p->sighand->action[sig - 1].sa.sa_handler = SIG_DFL;  in force_sigsegv()
2044 	    (psig->action[SIGCHLD-1].sa.sa_handler == SIG_IGN ||  in do_notify_parent()
2062 		if (psig->action[SIGCHLD-1].sa.sa_handler == SIG_IGN)  in do_notify_parent()
2138 	if (sighand->action[SIGCHLD-1].sa.sa_handler != SIG_IGN &&  in do_notify_parent_cldstop()
2753 		if (ka->sa.sa_handler == SIG_IGN) /* Do nothing.  */  in get_signal()
2755 		if (ka->sa.sa_handler != SIG_DFL) {  in get_signal()
2760 				ka->sa.sa_handler = SIG_DFL;  in get_signal()
4060 	current->sighand->action[sig - 1].sa.sa_handler = action;  in kernel_sigaction()
4409 		ret = get_user(handler, &act->sa_handler);  in COMPAT_SYSCALL_DEFINE4()
4410 		new_ka.sa.sa_handler = compat_ptr(handler);  in COMPAT_SYSCALL_DEFINE4()
4423 		ret = put_user(ptr_to_compat(old_ka.sa.sa_handler),   in COMPAT_SYSCALL_DEFINE4()
4424 			       &oact->sa_handler);  in COMPAT_SYSCALL_DEFINE4()
4449 		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||  in SYSCALL_DEFINE3()
4464 		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||  in SYSCALL_DEFINE3()
4486 		    __get_user(handler, &act->sa_handler) ||  in COMPAT_SYSCALL_DEFINE3()
4495 		new_ka.sa.sa_handler = compat_ptr(handler);  in COMPAT_SYSCALL_DEFINE3()
4504 		    __put_user(ptr_to_compat(old_ka.sa.sa_handler),  in COMPAT_SYSCALL_DEFINE3()
4505 			       &oact->sa_handler) ||  in COMPAT_SYSCALL_DEFINE3()
4548 	new_sa.sa.sa_handler = handler;  in SYSCALL_DEFINE2()
4554 	return ret ? ret : (unsigned long)old_sa.sa.sa_handler;  in SYSCALL_DEFINE2()