Function panic

freebsd/kern/kern_shutdown.c:837–844

* Panic is called on unresolvable fatal errors. It prints "panic: mesg", * and then reboots. If we are called twice, then we avoid trying to sync * the disks as this often leads to recursive panics. */

 * the disks as this often leads to recursive panics.
 */
void
panic(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	vpanic(fmt, ap);
}

void
vpanic(const char *fmt, va_list ap)