kernel/rcu/tree_plugin.h

179 	 * Decide where to queue the newly blocked task.  In theory,  in rcu_preempt_ctxt_queue()
252 	 * blocked tasks.  in rcu_preempt_ctxt_queue()
288  * current task, there might be any number of other tasks blocked while
333 	    !t->rcu_read_unlock_special.b.blocked) {  in rcu_note_context_switch()
338 		t->rcu_read_unlock_special.b.blocked = true;  in rcu_note_context_switch()
514 	 * blocked-tasks list below.  in rcu_preempt_deferred_qs_irqrestore()
519 	/* Clean up if blocked during RCU read-side critical section. */  in rcu_preempt_deferred_qs_irqrestore()
520 	if (special.b.blocked) {  in rcu_preempt_deferred_qs_irqrestore()
523 		 * Remove this task from the list it blocked on.  The task  in rcu_preempt_deferred_qs_irqrestore()
525 		 * CPU it first blocked on, so there is no longer any need  in rcu_preempt_deferred_qs_irqrestore()
634  * notify RCU core processing or task having blocked during the RCU
696  * Check that the list of blocked tasks for the newly completed grace
698  * period that still has RCU readers blocked!  This function must be
701  * Also, if there are blocked tasks on the list, they automatically
774 		WRITE_ONCE(t->rcu_read_unlock_special.b.blocked, true);  in exit_rcu()
785  * Dump the blocked-tasks state, but limit the list dump to the
930  * Because there is no preemptible RCU, there can be no readers blocked.
950 // structure's blocked-tasks list is always empty.  is therefore no need to
962  * Because there is no preemptible RCU, there can be no readers blocked,
963  * so there is no need to check for blocked tasks.  So check only for
1003  * Dump the guaranteed-empty blocked-tasks state.  Trust but verify.
1082 	 * expedited grace period must boost all blocked tasks, including  in rcu_boost()