235 static inline void free_signal_struct(struct signal_struct *sig)  in free_signal_struct()  argument
237 	taskstats_tgid_free(sig);  in free_signal_struct()
238 	sched_autogroup_exit(sig);  in free_signal_struct()
239 	kmem_cache_free(signal_cachep, sig);  in free_signal_struct()
242 static inline void put_signal_struct(struct signal_struct *sig)  in put_signal_struct()  argument
244 	if (atomic_dec_and_test(&sig->sigcnt))  in put_signal_struct()
245 		free_signal_struct(sig);  in put_signal_struct()
1069 	struct sighand_struct *sig;  in copy_sighand()  local
1075 	sig = kmem_cache_alloc(sighand_cachep, GFP_KERNEL);  in copy_sighand()
1076 	rcu_assign_pointer(tsk->sighand, sig);  in copy_sighand()
1077 	if (!sig)  in copy_sighand()
1080 	atomic_set(&sig->count, 1);  in copy_sighand()
1081 	memcpy(sig->action, current->sighand->action, sizeof(sig->action));  in copy_sighand()
1100 static void posix_cpu_timers_init_group(struct signal_struct *sig)  in posix_cpu_timers_init_group()  argument
1104 	cpu_limit = READ_ONCE(sig->rlim[RLIMIT_CPU].rlim_cur);  in posix_cpu_timers_init_group()
1106 		sig->cputime_expires.prof_exp = secs_to_cputime(cpu_limit);  in posix_cpu_timers_init_group()
1107 		sig->cputimer.running = true;  in posix_cpu_timers_init_group()
1111 	INIT_LIST_HEAD(&sig->cpu_timers[0]);  in posix_cpu_timers_init_group()
1112 	INIT_LIST_HEAD(&sig->cpu_timers[1]);  in posix_cpu_timers_init_group()
1113 	INIT_LIST_HEAD(&sig->cpu_timers[2]);  in posix_cpu_timers_init_group()
1118 	struct signal_struct *sig;  in copy_signal()  local
1123 	sig = kmem_cache_zalloc(signal_cachep, GFP_KERNEL);  in copy_signal()
1124 	tsk->signal = sig;  in copy_signal()
1125 	if (!sig)  in copy_signal()
1128 	sig->nr_threads = 1;  in copy_signal()
1129 	atomic_set(&sig->live, 1);  in copy_signal()
1130 	atomic_set(&sig->sigcnt, 1);  in copy_signal()
1133 	sig->thread_head = (struct list_head)LIST_HEAD_INIT(tsk->thread_node);  in copy_signal()
1134 	tsk->thread_node = (struct list_head)LIST_HEAD_INIT(sig->thread_head);  in copy_signal()
1136 	init_waitqueue_head(&sig->wait_chldexit);  in copy_signal()
1137 	sig->curr_target = tsk;  in copy_signal()
1138 	init_sigpending(&sig->shared_pending);  in copy_signal()
1139 	INIT_LIST_HEAD(&sig->posix_timers);  in copy_signal()
1140 	seqlock_init(&sig->stats_lock);  in copy_signal()
1141 	prev_cputime_init(&sig->prev_cputime);  in copy_signal()
1143 	hrtimer_init(&sig->real_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);  in copy_signal()
1144 	sig->real_timer.function = it_real_fn;  in copy_signal()
1147 	memcpy(sig->rlim, current->signal->rlim, sizeof sig->rlim);  in copy_signal()
1150 	posix_cpu_timers_init_group(sig);  in copy_signal()
1152 	tty_audit_fork(sig);  in copy_signal()
1153 	sched_autogroup_fork(sig);  in copy_signal()
1155 	sig->oom_score_adj = current->signal->oom_score_adj;  in copy_signal()
1156 	sig->oom_score_adj_min = current->signal->oom_score_adj_min;  in copy_signal()
1158 	sig->has_child_subreaper = current->signal->has_child_subreaper ||  in copy_signal()
1161 	mutex_init(&sig->cred_guard_mutex);  in copy_signal()