418 	struct sigqueue *q = NULL;  in __sigqueue_alloc()  local
438 		q = kmem_cache_alloc(sigqueue_cachep, flags);  in __sigqueue_alloc()
443 	if (unlikely(q == NULL)) {  in __sigqueue_alloc()
447 		INIT_LIST_HEAD(&q->list);  in __sigqueue_alloc()
448 		q->flags = 0;  in __sigqueue_alloc()
449 		q->user = user;  in __sigqueue_alloc()
452 	return q;  in __sigqueue_alloc()
455 static void __sigqueue_free(struct sigqueue *q)  in __sigqueue_free()  argument
457 	if (q->flags & SIGQUEUE_PREALLOC)  in __sigqueue_free()
459 	if (atomic_dec_and_test(&q->user->sigpending))  in __sigqueue_free()
460 		free_uid(q->user);  in __sigqueue_free()
461 	kmem_cache_free(sigqueue_cachep, q);  in __sigqueue_free()
466 	struct sigqueue *q;  in flush_sigqueue()  local
470 		q = list_entry(queue->list.next, struct sigqueue , list);  in flush_sigqueue()
471 		list_del_init(&q->list);  in flush_sigqueue()
472 		__sigqueue_free(q);  in flush_sigqueue()
495 	struct sigqueue *q, *n;  in __flush_itimer_signals()  local
500 	list_for_each_entry_safe(q, n, &pending->list, list) {  in __flush_itimer_signals()
501 		int sig = q->info.si_signo;  in __flush_itimer_signals()
503 		if (likely(q->info.si_code != SI_TIMER)) {  in __flush_itimer_signals()
507 			list_del_init(&q->list);  in __flush_itimer_signals()
508 			__sigqueue_free(q);  in __flush_itimer_signals()
574 	struct sigqueue *q, *first = NULL;  in collect_signal()  local
580 	list_for_each_entry(q, &list->list, list) {  in collect_signal()
581 		if (q->info.si_signo == sig) {  in collect_signal()
584 			first = q;  in collect_signal()
714 	struct sigqueue *q, *sync = NULL;  in dequeue_synchronous_signal()  local
725 	list_for_each_entry(q, &pending->list, list) {  in dequeue_synchronous_signal()
727 		if ((q->info.si_code > SI_USER) &&  in dequeue_synchronous_signal()
728 		    (sigmask(q->info.si_signo) & SYNCHRONOUS_MASK)) {  in dequeue_synchronous_signal()
729 			sync = q;  in dequeue_synchronous_signal()
738 	list_for_each_entry_continue(q, &pending->list, list) {  in dequeue_synchronous_signal()
739 		if (q->info.si_signo == sync->info.si_signo)  in dequeue_synchronous_signal()
785 	struct sigqueue *q, *n;  in flush_sigqueue_mask()  local
793 	list_for_each_entry_safe(q, n, &s->list, list) {  in flush_sigqueue_mask()
794 		if (sigismember(mask, q->info.si_signo)) {  in flush_sigqueue_mask()
795 			list_del_init(&q->list);  in flush_sigqueue_mask()
796 			__sigqueue_free(q);  in flush_sigqueue_mask()
1078 	struct sigqueue *q;  in __send_signal()  local
1119 	q = __sigqueue_alloc(sig, t, GFP_ATOMIC, override_rlimit);  in __send_signal()
1120 	if (q) {  in __send_signal()
1121 		list_add_tail(&q->list, &pending->list);  in __send_signal()
1124 			clear_siginfo(&q->info);  in __send_signal()
1125 			q->info.si_signo = sig;  in __send_signal()
1126 			q->info.si_errno = 0;  in __send_signal()
1127 			q->info.si_code = SI_USER;  in __send_signal()
1128 			q->info.si_pid = task_tgid_nr_ns(current,  in __send_signal()
1131 			q->info.si_uid =  in __send_signal()
1137 			clear_siginfo(&q->info);  in __send_signal()
1138 			q->info.si_signo = sig;  in __send_signal()
1139 			q->info.si_errno = 0;  in __send_signal()
1140 			q->info.si_code = SI_KERNEL;  in __send_signal()
1141 			q->info.si_pid = 0;  in __send_signal()
1142 			q->info.si_uid = 0;  in __send_signal()
1145 			copy_siginfo(&q->info, info);  in __send_signal()
1822 	struct sigqueue *q = __sigqueue_alloc(-1, current, GFP_KERNEL, 0);  in sigqueue_alloc()  local
1824 	if (q)  in sigqueue_alloc()
1825 		q->flags |= SIGQUEUE_PREALLOC;  in sigqueue_alloc()
1827 	return q;  in sigqueue_alloc()
1830 void sigqueue_free(struct sigqueue *q)  in sigqueue_free()  argument
1835 	BUG_ON(!(q->flags & SIGQUEUE_PREALLOC));  in sigqueue_free()
1842 	q->flags &= ~SIGQUEUE_PREALLOC;  in sigqueue_free()
1847 	if (!list_empty(&q->list))  in sigqueue_free()
1848 		q = NULL;  in sigqueue_free()
1851 	if (q)  in sigqueue_free()
1852 		__sigqueue_free(q);  in sigqueue_free()
1855 int send_sigqueue(struct sigqueue *q, struct pid *pid, enum pid_type type)  in send_sigqueue()  argument
1857 	int sig = q->info.si_signo;  in send_sigqueue()
1863 	BUG_ON(!(q->flags & SIGQUEUE_PREALLOC));  in send_sigqueue()
1877 	if (unlikely(!list_empty(&q->list))) {  in send_sigqueue()
1882 		BUG_ON(q->info.si_code != SI_TIMER);  in send_sigqueue()
1883 		q->info.si_overrun++;  in send_sigqueue()
1887 	q->info.si_overrun = 0;  in send_sigqueue()
1891 	list_add_tail(&q->list, &pending->list);  in send_sigqueue()
1896 	trace_signal_generate(sig, &q->info, t, type != PIDTYPE_PID, result);  in send_sigqueue()