For kernel build with CONFIG_PROVE_RCU=y and CONFIG_DEBUG_LOCK_ALLOC=y,
when the synchronize_rcu_tasks_generic() called occurs during the
rcu_scheduler_active variable is RCU_SCHEDULER_INACTIVE, the warnings
will be trigger, however the warnings is not actually triggered because
the debug_lockdep_rcu_enabled() return false(the rcu_scheduler_active !=
RCU_SCHEDULER_INACTIVE condition is false).
This commit replace RCU_LOCKDEP_WARN() with WARN_ONCE() to trigger
warnings.
Signed-off-by: Zqiang <qiang1.zhang@xxxxxxxxx>
---
kernel/rcu/tasks.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
index 83c7e6620d40..469bf2a3b505 100644
--- a/kernel/rcu/tasks.h
+++ b/kernel/rcu/tasks.h
@@ -560,7 +560,7 @@ static int __noreturn rcu_tasks_kthread(void *arg)
static void synchronize_rcu_tasks_generic(struct rcu_tasks *rtp)
{
/* Complain if the scheduler has not started. */
- RCU_LOCKDEP_WARN(rcu_scheduler_active == RCU_SCHEDULER_INACTIVE,
+ WARN_ONCE(rcu_scheduler_active == RCU_SCHEDULER_INACTIVE,
"synchronize_rcu_tasks called too soon");
// If the grace-period kthread is running, use it.
--
2.25.1
