[PATCH RFC v2 20/24] hazptrtorture: Detach deferred and IPIed hazard pointers

[Paul E. McKenney]

From: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>

Pass to hazptr_detach() those hazard pointers that are to be released
in some other task or within the context of an IPI handler.

[ paulmck: s/hazptr_detach_from_task/hazptr_detach/ per Mathieu. ]

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
 kernel/rcu/hazptrtorture.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/rcu/hazptrtorture.c b/kernel/rcu/hazptrtorture.c
index 311b387d6ae755..ac0cb5b9f4f0f6 100644
--- a/kernel/rcu/hazptrtorture.c
+++ b/kernel/rcu/hazptrtorture.c
@@ -411,6 +411,7 @@ hazptr_torture_reader_tail(struct hazptr_pending *hppp, struct torture_random_st
 	preempt_enable();
 	if (irq_release && !(torture_random(trsp) % irq_release)) {
 		guard(preempt)();
+		hazptr_detach(&hppp->hpp_hc);
 		cpu = cpumask_next_wrap(smp_processor_id(), cpu_online_mask);
 		smp_call_function_single(cpu, hazptr_torture_release, hppp, 1);
 	} else {
@@ -428,6 +429,7 @@ static void hazptr_torture_defer(struct hazptr_pending *hppp, struct torture_ran
 	struct llist_head *llhp;
 
 	guard(preempt)();
+	hazptr_detach(&hppp->hpp_hc);
 	cpu = cpumask_next_wrap(cpu, cpu_online_mask);
 	llhp = per_cpu_ptr(&hazptr_pending, cpu);
 	llist_add(&hppp->hpp_node, llhp);
-- 
2.40.1