nocb: Remove show_rcu_nocb_state() false positive printout

The rcu_data structure's ->nocb_timer field is used to defer wakeups of
the corresponding no-CBs CPU's grace-period kthread ("rcuog*"), and that
structure's ->nocb_defer_wakeup field is used to track such deferral.
This means that the show_rcu_nocb_state() printing an error when those
fields are set for a CPU not corresponding to a no-CBs grace-period
kthread is erroneous.

This commit therefore switches the check from ->nocb_timer to
->nocb_bypass_timer and removes the check of ->nocb_defer_wakeup.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index bbc0c07..4d63ee3 100644 (file)
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -2411,10 +2411,9 @@ static void show_rcu_nocb_state(struct rcu_data *rdp)
                return;
 
        waslocked = raw_spin_is_locked(&rdp->nocb_gp_lock);
-       wastimer = timer_pending(&rdp->nocb_timer);
+       wastimer = timer_pending(&rdp->nocb_bypass_timer);
        wassleep = swait_active(&rdp->nocb_gp_wq);
-       if (!rdp->nocb_defer_wakeup && !rdp->nocb_gp_sleep &&
-           !waslocked && !wastimer && !wassleep)
+       if (!rdp->nocb_gp_sleep && !waslocked && !wastimer && !wassleep)
                return;  /* Nothing untowards. */
 
        pr_info("   nocb GP activity on CB-only CPU!!! %c%c%c%c %c\n",