Commit c47e067a authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Remove orphan/adopt event-tracing fields 



The rcu_node structure's ->n_cbs_orphaned and ->n_cbs_adopted fields
are updated, but never read.  This commit therefore removes them.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent a2b2df20

kernel/rcu/tree.c

+0 −2
Original line number Diff line number Diff line
@@ -3871,7 +3871,6 @@ rcu_send_cbs_to_orphanage(int cpu, struct rcu_state *rsp, 
	 * because _rcu_barrier() excludes CPU-hotplug operations, so it

	 * cannot be running now.  Thus no memory barrier is required.

	 */

	rdp->n_cbs_orphaned += rcu_segcblist_n_cbs(&rdp->cblist);

	rcu_segcblist_extract_count(&rdp->cblist, &rsp->orphan_done);



	/*
@@ -3910,7 +3909,6 @@ static void rcu_adopt_orphan_cbs(struct rcu_state *rsp, unsigned long flags) 
		return;



	/* Do the accounting first. */

	rdp->n_cbs_adopted += rsp->orphan_done.len;

	if (rsp->orphan_done.len_lazy != rsp->orphan_done.len)

		rcu_idle_count_callbacks_posted();

	rcu_segcblist_insert_count(&rdp->cblist, &rsp->orphan_done);

kernel/rcu/tree.h

+0 −2
Original line number Diff line number Diff line
@@ -219,8 +219,6 @@ struct rcu_data { 
					/* qlen at last check for QS forcing */

	unsigned long	n_cbs_invoked;	/* count of RCU cbs invoked. */

	unsigned long	n_nocbs_invoked; /* count of no-CBs RCU cbs invoked. */

	unsigned long   n_cbs_orphaned; /* RCU cbs orphaned by dying CPU */

	unsigned long   n_cbs_adopted;  /* RCU cbs adopted from dying CPU */

	unsigned long	n_force_qs_snap;

					/* did other CPU force QS recently? */

	long		blimit;		/* Upper limit on a processed batch */