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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-01-09 15:25:55 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-01-23 11:37:14 -0800 |
| commit | 8dc79888a792f6c365c2a26903e49ff919e72488 (patch) | |
| tree | 0c200a9e0515e1753c0baa9d827d684da8491345 | |
| parent | bb4e2c08bbfa8eb032db7814f6100086aac102d3 (diff) | |
| download | talos-obmc-linux-8dc79888a792f6c365c2a26903e49ff919e72488.tar.gz talos-obmc-linux-8dc79888a792f6c365c2a26903e49ff919e72488.zip | |
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>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
| -rw-r--r-- | kernel/rcu/tree_exp.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h index 303df97bbfc5..f3e214898e3a 100644 --- a/kernel/rcu/tree_exp.h +++ b/kernel/rcu/tree_exp.h @@ -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); |
