Commit-ID: c47e067a3c57835fe5ce24d50482f5c325a64efd
Gitweb: http://git.kernel.org/tip/c47e067a3c57835fe5ce24d50482f5c325a64efd
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Fri, 23 Jun 2017 20:30:08 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Tue, 25 Jul 2017 13:04:46 -0700
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: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
kernel/rcu/tree.c | 2 --
kernel/rcu/tree.h | 2 --
2 files changed, 4 deletions(-)
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index f431114..f5acf34 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -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);
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 9af0f31..aec53c4 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -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 */
--
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