console_unlock - unlock the console system
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.
|January 2017||Kernel Hackers Manual 4.8.|