rcu: Add lockdep checks to synchronous expedited primitives (8dc79888) · Commits · 戴 / test

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> Reviewed-by:

Josh Triplett <josh@joshtriplett.org>

kernel/rcu/tree_exp.h

+10 −0

Original line number	Diff line number	Diff line
		@@ -639,6 +639,11 @@ void synchronize_sched_expedited(void)
		{
		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;
		@@ -708,6 +713,11 @@ void synchronize_rcu_expedited(void)
		{
		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 == RCU_SCHEDULER_INACTIVE)
		return;
		_synchronize_rcu_expedited(rsp, sync_rcu_exp_handler);

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