Function make_dev_alias_v

freebsd/kern/kern_conf.c:962–1001

}

static int
make_dev_alias_v(int flags, struct cdev **cdev, struct cdev *pdev,
    const char *fmt, va_list ap)
{
	struct cdev *dev;
	int error;

	KASSERT(pdev != NULL, ("make_dev_alias_v: pdev is NULL"));
	KASSERT((flags & MAKEDEV_WAITOK) == 0 || (flags & MAKEDEV_NOWAIT) == 0,
	    ("make_dev_alias_v: both WAITOK and NOWAIT specified"));
	KASSERT((flags & ~(MAKEDEV_WAITOK | MAKEDEV_NOWAIT |
	    MAKEDEV_CHECKNAME)) == 0,
	    ("make_dev_alias_v: invalid flags specified (flags=%02x)", flags));

	dev = devfs_alloc(flags);
	if (dev == NULL)
		return (ENOMEM);
	dev_lock();
	dev->si_flags |= SI_ALIAS;
	error = prep_devname(dev, fmt, ap);
	if (error != 0) {
		if ((flags & MAKEDEV_CHECKNAME) == 0) {
			panic("make_dev_alias_v: bad si_name "
			    "(error=%d, si_name=%s)", error, dev->si_name);
		}
		dev_unlock();
		devfs_free(dev);
		return (error);
	}
	dev->si_flags |= SI_NAMED;
	devfs_create(dev);
	dev_dependsl(pdev, dev);
	clean_unrhdrl(devfs_inos);
	dev_unlock();

	notify_create(dev, flags);
	*cdev = dev;

	return (0);
}

struct cdev *
make_dev_alias(struct cdev *pdev, const char *fmt, ...)