151 struct rcu_node {  struct
152 	raw_spinlock_t lock;	/* Root rcu_node's lock protects some */  argument
156 				/*  behind the root rcu_node's gpnum. */  argument
159 				/*  behind the root rcu_node's gpnum. */  argument
162 				/*  In leaf rcu_node, each bit corresponds to */  argument
166 	unsigned long qsmaskinit;
190 				/*  rcu_node tree? */  argument
191 	struct rcu_node *parent;  argument
209 				/*  boosting is needed for this rcu_node */  argument
221 				/*  boosting for this rcu_node structure. */  argument
222 	unsigned int boost_kthread_status;
224 	unsigned long n_tasks_boosted;
226 	unsigned long n_exp_boosts;
228 	unsigned long n_normal_boosts;
230 	unsigned long n_balk_blkd_tasks;
255  * Do a full breadth-first scan of the rcu_node structures for the  argument