rcu: Add lockdep checks to synchronous expedited primitives
The non-expedited synchronize_*rcu() primitives have lockdep checks, but
their expedited counterparts lack these checks. This commit therefore
adds these checks to the expedited synchronize_*rcu() primitives.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h
index a6c3d86..a377954 100644
--- a/kernel/rcu/tree_exp.h
+++ b/kernel/rcu/tree_exp.h
@@ -621,6 +621,11 @@
{
struct rcu_state *rsp = &rcu_sched_state;
+ RCU_LOCKDEP_WARN(lock_is_held(&rcu_bh_lock_map) ||
+ lock_is_held(&rcu_lock_map) ||
+ lock_is_held(&rcu_sched_lock_map),
+ "Illegal synchronize_sched_expedited() in RCU read-side critical section");
+
/* If only one CPU, this is automatically a grace period. */
if (rcu_blocking_is_gp())
return;
@@ -690,6 +695,10 @@
{
struct rcu_state *rsp = rcu_state_p;
+ RCU_LOCKDEP_WARN(lock_is_held(&rcu_bh_lock_map) ||
+ lock_is_held(&rcu_lock_map) ||
+ lock_is_held(&rcu_sched_lock_map),
+ "Illegal synchronize_rcu_expedited() in RCU read-side critical section");
if (!rcu_scheduler_active)
return;
_synchronize_rcu_expedited(rsp, sync_rcu_exp_handler);
