linux-master/kernel/fork.c

419 /* SLAB cache for sighand_struct structures (tsk->sighand) */
1131 	 * the sighand lock in case orig has changed between now and
1807 		refcount_inc(&current->sighand->count);
1811 	RCU_INIT_POINTER(tsk->sighand, sig);
1816 	spin_lock_irq(&current->sighand->siglock);
1817 	memcpy(sig->action, current->sighand->action, sizeof(sig->action));
1818 	spin_unlock_irq(&current->sighand->siglock);
1827 void __cleanup_sighand(struct sighand_struct *sighand)
1829 	if (refcount_dec_and_test(&sighand->count)) {
1830 		signalfd_cleanup(sighand);
1835 		kmem_cache_free(sighand_cachep, sighand);
1907 	 * Must be called with sighand->lock held, which is common to
1912 	assert_spin_locked(&current->sighand->siglock);
1921 	 * sighand lock. The seccomp state and nnp must be in sync.
1928 	 * flags and between before we held the sighand lock, we have
2210 	spin_lock_irq(&current->sighand->siglock);
2214 	spin_unlock_irq(&current->sighand->siglock);
2536 	spin_lock(&current->sighand->siglock);
2558 	 * before holding sighand lock.
2605 	spin_unlock(&current->sighand->siglock);
2627 	spin_unlock(&current->sighand->siglock);
2654 	__cleanup_sighand(p->sighand);
2683 	spin_lock_irq(&current->sighand->siglock);
2685 	spin_unlock_irq(&current->sighand->siglock);
3140 	struct sighand_struct *sighand = data;
3142 	spin_lock_init(&sighand->siglock);
3143 	init_waitqueue_head(&sighand->signalfd_wqh);
3214 		if (refcount_read(&current->sighand->count) > 1)