Function intr_event_create

freebsd/kern/kern_intr.c:255–290

}

int
intr_event_create(struct intr_event **event, void *source, int flags, int irq,
    void (*pre_ithread)(void *), void (*post_ithread)(void *),
    void (*post_filter)(void *), int (*assign_cpu)(void *, int),
    const char *fmt, ...)
{
	struct intr_event *ie;
	va_list ap;

	/* The only valid flag during creation is IE_SOFT. */
	if ((flags & ~IE_SOFT) != 0)
		return (EINVAL);
	ie = malloc(sizeof(struct intr_event), M_ITHREAD, M_WAITOK | M_ZERO);
	ie->ie_source = source;
	ie->ie_pre_ithread = pre_ithread;
	ie->ie_post_ithread = post_ithread;
	ie->ie_post_filter = post_filter;
	ie->ie_assign_cpu = assign_cpu;
	ie->ie_flags = flags;
	ie->ie_irq = irq;
	ie->ie_cpu = NOCPU;
	CK_SLIST_INIT(&ie->ie_handlers);
	mtx_init(&ie->ie_lock, "intr event", NULL, MTX_DEF);

	va_start(ap, fmt);
	vsnprintf(ie->ie_name, sizeof(ie->ie_name), fmt, ap);
	va_end(ap);
	strlcpy(ie->ie_fullname, ie->ie_name, sizeof(ie->ie_fullname));
	mtx_lock(&event_lock);
	TAILQ_INSERT_TAIL(&event_list, ie, ie_list);
	mtx_unlock(&event_lock);
	if (event != NULL)
		*event = ie;
	CTR2(KTR_INTR, "%s: created %s", __func__, ie->ie_name);
	return (0);
}

/*
 * Bind an interrupt event to the specified CPU.  Note that not all