910 static inline void free_signal_struct(struct signal_struct *sig)  in free_signal_struct()  argument
912 	taskstats_tgid_free(sig);  in free_signal_struct()
913 	sched_autogroup_exit(sig);  in free_signal_struct()
918 	if (sig->oom_mm)  in free_signal_struct()
919 		mmdrop_async(sig->oom_mm);  in free_signal_struct()
920 	kmem_cache_free(signal_cachep, sig);  in free_signal_struct()
923 static inline void put_signal_struct(struct signal_struct *sig)  in put_signal_struct()  argument
925 	if (refcount_dec_and_test(&sig->sigcnt))  in put_signal_struct()
926 		free_signal_struct(sig);  in put_signal_struct()
1749 	struct sighand_struct *sig;  in copy_sighand()  local
1755 	sig = kmem_cache_alloc(sighand_cachep, GFP_KERNEL);  in copy_sighand()
1756 	RCU_INIT_POINTER(tsk->sighand, sig);  in copy_sighand()
1757 	if (!sig)  in copy_sighand()
1760 	refcount_set(&sig->count, 1);  in copy_sighand()
1762 	memcpy(sig->action, current->sighand->action, sizeof(sig->action));  in copy_sighand()
1787 static void posix_cpu_timers_init_group(struct signal_struct *sig)  in posix_cpu_timers_init_group()  argument
1789 	struct posix_cputimers *pct = &sig->posix_cputimers;  in posix_cpu_timers_init_group()
1792 	cpu_limit = READ_ONCE(sig->rlim[RLIMIT_CPU].rlim_cur);  in posix_cpu_timers_init_group()
1798 	struct signal_struct *sig;  in copy_signal()  local
1803 	sig = kmem_cache_zalloc(signal_cachep, GFP_KERNEL);  in copy_signal()
1804 	tsk->signal = sig;  in copy_signal()
1805 	if (!sig)  in copy_signal()
1808 	sig->nr_threads = 1;  in copy_signal()
1809 	sig->quick_threads = 1;  in copy_signal()
1810 	atomic_set(&sig->live, 1);  in copy_signal()
1811 	refcount_set(&sig->sigcnt, 1);  in copy_signal()
1814 	sig->thread_head = (struct list_head)LIST_HEAD_INIT(tsk->thread_node);  in copy_signal()
1815 	tsk->thread_node = (struct list_head)LIST_HEAD_INIT(sig->thread_head);  in copy_signal()
1817 	init_waitqueue_head(&sig->wait_chldexit);  in copy_signal()
1818 	sig->curr_target = tsk;  in copy_signal()
1819 	init_sigpending(&sig->shared_pending);  in copy_signal()
1820 	INIT_HLIST_HEAD(&sig->multiprocess);  in copy_signal()
1821 	seqlock_init(&sig->stats_lock);  in copy_signal()
1822 	prev_cputime_init(&sig->prev_cputime);  in copy_signal()
1825 	INIT_LIST_HEAD(&sig->posix_timers);  in copy_signal()
1826 	hrtimer_init(&sig->real_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);  in copy_signal()
1827 	sig->real_timer.function = it_real_fn;  in copy_signal()
1831 	memcpy(sig->rlim, current->signal->rlim, sizeof sig->rlim);  in copy_signal()
1834 	posix_cpu_timers_init_group(sig);  in copy_signal()
1836 	tty_audit_fork(sig);  in copy_signal()
1837 	sched_autogroup_fork(sig);  in copy_signal()
1839 	sig->oom_score_adj = current->signal->oom_score_adj;  in copy_signal()
1840 	sig->oom_score_adj_min = current->signal->oom_score_adj_min;  in copy_signal()
1842 	mutex_init(&sig->cred_guard_mutex);  in copy_signal()
1843 	init_rwsem(&sig->exec_update_lock);  in copy_signal()