The following commit has been merged into the core/rcu branch of tip: Commit-ID: 775227511843202e65a7f194cbf64f38de01f004 Gitweb: https://git.kernel.org/tip/775227511843202e65a7f194cbf64f38de01f004 Author: Paul E. McKenney <paulmck@xxxxxxxxxx> AuthorDate: Thu, 11 Jun 2020 16:43:14 -07:00 Committer: Paul E. McKenney <paulmck@xxxxxxxxxx> CommitterDate: Mon, 29 Jun 2020 12:01:44 -07:00 rcutorture: Check for unwatched readers RCU is supposed to be watching all non-idle kernel code and also all softirq handlers. This commit adds some teeth to this statement by adding a WARN_ON_ONCE(). Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx> --- kernel/rcu/rcutorture.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 37455a1..9c31001 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1377,6 +1377,7 @@ static bool rcu_torture_one_read(struct torture_random_state *trsp) struct rt_read_seg *rtrsp1; unsigned long long ts; + WARN_ON_ONCE(!rcu_is_watching()); newstate = rcutorture_extend_mask(readstate, trsp); rcutorture_one_extend(&readstate, newstate, trsp, rtrsp++); started = cur_ops->get_gp_seq();
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