From: "Paul E. McKenney" <paulmck@xxxxxxxxxx> Within the rcu_sr_normal_gp_cleanup_work() function, there is an acquire load from rcu_state.srs_done_tail, which is expected to be non-NULL. This commit adds a WARN_ON_ONCE() to check this expectation. Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx> Signed-off-by: Neeraj Upadhyay <neeraj.upadhyay@xxxxxxxxxx> --- kernel/rcu/tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index e641cc681901..0f41a81138dc 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -1649,7 +1649,7 @@ static void rcu_sr_normal_gp_cleanup_work(struct work_struct *work) * the done tail list manipulations are protected here. */ done = smp_load_acquire(&rcu_state.srs_done_tail); - if (!done) + if (WARN_ON_ONCE(!done)) return; WARN_ON_ONCE(!rcu_sr_is_wait_head(done)); -- 2.40.1
