The purpose of the "busted" torture type is to test rcutorture code paths
used only when a too-short grace period is detected.  Currently, "busted"
only uses normal rcu_read_lock()-style readers, which fails to exercise
much of the "Failure/close-call rcutorture reader segments" functionality.
This commit therefore sets the .extendables field of rcu_busted_ops to
RCUTORTURE_MAX_EXTEND in order to more fully exercise the reporting.

Signed-off-by: Paul E. McKenney <paul...@kernel.org>
Cc: Frederic Weisbecker <frede...@kernel.org>
---
 kernel/rcu/rcutorture.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 61b092a3dc3f3..81b3743f81dca 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -639,6 +639,7 @@ static struct rcu_torture_ops rcu_busted_ops = {
        .exp_sync       = synchronize_rcu_busted,
        .call           = call_rcu_busted,
        .irq_capable    = 1,
+       .extendables    = RCUTORTURE_MAX_EXTEND,
        .name           = "busted"
 };
 
-- 
2.40.1


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