rcu: Remove obsolete __rcu_pending() statistics for debugfs
The debugfs interface displayed statistics on RCU-pending checks
but this interface has since been removed. This commit therefore
removes the no-longer-used rcu_data structure's ->n_rcu_pending,
->n_rp_core_needs_qs, ->n_rp_report_qs, ->n_rp_cb_ready,
->n_rp_cpu_needs_gp, ->n_rp_gp_completed, ->n_rp_gp_started,
->n_rp_nocb_defer_wakeup, and ->n_rp_need_nothing fields along with
their updates.
If this information proves necessary in the future, the corresponding
event traces will be added.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index b258fac..d29bab8 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -226,18 +226,7 @@ struct rcu_data {
/* Grace period that needs help */
/* from cond_resched(). */
- /* 5) __rcu_pending() statistics. */
- unsigned long n_rcu_pending; /* rcu_pending() calls since boot. */
- unsigned long n_rp_core_needs_qs;
- unsigned long n_rp_report_qs;
- unsigned long n_rp_cb_ready;
- unsigned long n_rp_cpu_needs_gp;
- unsigned long n_rp_gp_completed;
- unsigned long n_rp_gp_started;
- unsigned long n_rp_nocb_defer_wakeup;
- unsigned long n_rp_need_nothing;
-
- /* 6) _rcu_barrier(), OOM callbacks, and expediting. */
+ /* 5) _rcu_barrier(), OOM callbacks, and expediting. */
struct rcu_head barrier_head;
#ifdef CONFIG_RCU_FAST_NO_HZ
struct rcu_head oom_head;
@@ -248,7 +237,7 @@ struct rcu_data {
atomic_long_t exp_workdone3; /* # done by others #3. */
int exp_dynticks_snap; /* Double-check need for IPI. */
- /* 7) Callback offloading. */
+ /* 6) Callback offloading. */
#ifdef CONFIG_RCU_NOCB_CPU
struct rcu_head *nocb_head; /* CBs waiting for kthread. */
struct rcu_head **nocb_tail;
@@ -275,7 +264,7 @@ struct rcu_data {
/* Leader CPU takes GP-end wakeups. */
#endif /* #ifdef CONFIG_RCU_NOCB_CPU */
- /* 8) RCU CPU stall data. */
+ /* 7) RCU CPU stall data. */
unsigned int softirq_snap; /* Snapshot of softirq activity. */
/* ->rcu_iw* fields protected by leaf rcu_node ->lock. */
struct irq_work rcu_iw; /* Check for non-irq activity. */