CONSOLE_TRYLOCK(9) Driver Basics CONSOLE_TRYLOCK(9)NAMEconsole_trylock - try to lock the console system for exclusive use.
Tried to acquire a lock which guarantees that the caller has exclusive
access to the console system and the console_drivers list.
returns 1 on success, and 0 on failure to acquire the lock.
COPYRIGHTKernel Hackers Manual 3.8. June 2014 CONSOLE_TRYLOCK(9)