kernel/printk/nbcon.c

36  *     console. Only higher priority contexts are allowed to take over the
42  *     taken over by a higher priority context, released, and taken on another
48  *     current owner aware that there is a context with a higher priority
101  *   - Preference for higher priority contexts.
117  * The output of one printk record might be interrupted with a higher priority
236  *			waiter has the same or higher priority. No acquire
298 	 * - Only a context with a priority higher than the owner can become  in nbcon_waiter_matches()
300 	 * - Only a context with a priority higher than the waiter can  in nbcon_waiter_matches()
309 	 * 2. Another context with a higher priority than this context  in nbcon_waiter_matches()
311 	 * 3. The higher priority context releases the ownership.  in nbcon_waiter_matches()
388 		 * over by a higher priority context.  in nbcon_context_try_acquire_requested()
403  * The function must be called only when the context has higher priority
409  * or an even higher context takes over the request, or timeout expires.
421  *			Or a higher priority context has taken over the
510 		 * can only happen if a higher priority context has taken over  in nbcon_context_try_acquire_handover()
714  * to eventually free the lock for a higher priority context which asked
723  * a higher priority context took the lock.
751 	/* Waiters always have higher priorities than owners. */  in nbcon_context_can_proceed()
784  * for a higher priority context which asked for the friendly handover.
790  * operation. It does not make sense to do the operation when a higher
1154 	 * The higher priority printing context takes over responsibility  in nbcon_emit_one()
1193 	 * where the context with a higher priority takes over the nbcon console  in nbcon_kthread_should_wakeup()