kernel/printk/printk.c

319 	 * because spindump/WARN/etc from under console ->lock will
708 	struct mutex lock;
797 	ret = mutex_lock_interruptible(&user->lock);
844 	mutex_unlock(&user->lock);
929 	mutex_init(&user->lock);
943 	mutex_destroy(&user->lock);
1848  * ready to hand over the lock at the end of the section.
1853 	 * Do not use spinning in panic(). The panic CPU wants to keep the lock.
1880  * safe to start busy waiting for the lock. Second, it checks if
1881  * there is a busy waiter and passes the lock rights to her.
1883  * Important: Callers lose both the console_lock and the SRCU read lock if
1885  *	console_lock or SRCU read lock in this case.
1887  * Return: 1 if the lock rights were passed, 0 otherwise.
1925 	 * Preserve lockdep lock ordering. Release the SRCU read lock before
1944  * is ready to lose the lock.
1946  * Return: 1 if we got the lock, 0 othrewise
2002 	 * The owner passed the console lock to us.
2003 	 * Since we did not spin on console lock, annotate
2667  * Acquires a lock which guarantees that no consoles will
2689  * Try to acquire a lock which guarantees that no consoles will
2692  * returns 1 on success, and 0 on failure to acquire the lock.
2875  * console_lock and the SRCU read lock. Otherwise it is set to false.
2877  * @cookie is the cookie from the SRCU read lock.
2882  * Requires the console_lock and the SRCU read lock.
2997 			 * If a handover has occurred, the SRCU read lock
3036  * the output prior to releasing the lock.
3111 	 * console lock, which in particular can be dangerous if
3138 		 * Attempting to trylock the console lock can deadlock
3210 	 * Ignore the console lock and flush out the messages. Attempting a
3220 	 * If another context is holding the console lock,
3898  * Context: Process context. May sleep while acquiring console lock.
4319  * Try to obtain lock on console subsystem and replay all
4321  * Does nothing if lock is not obtained.
4341  *                            spinning lock is not owned by any CPU.
4355  *                               spinning lock.
4357  * If no processor has the lock, the calling processor takes the lock and
4359  * lock, this function succeeds immediately.
4372 	 * Guarantee loads and stores from this CPU when it is the lock owner
4373 	 * are _not_ visible to the previous lock owner. This pairs with
4410  * __printk_cpu_sync_put() - Release the printk cpu-reentrant spinning lock.
4412  * The calling processor must be the owner of the lock.
4430 	 * lock owner are visible to the next lock owner. This pairs