console_unlock — unlock the console system
| void console_unlock ( | void ); | 
Releases the console_lock which the caller holds on the console system and the console driver list.
   While the console_lock was held, console output may have been buffered
   by printk.  If this is the case, console_unlock; emits
   the output prior to releasing the lock.
   
   If there is output waiting, we wake /dev/kmsg and syslog users.
   
   console_unlock; may be called from any context.