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-rw-r--r--block/cfq-iosched.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index fd566c1..ae21919 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -3087,7 +3087,8 @@ cfq_drop_dead_cic(struct cfq_data *cfqd, struct io_context *ioc,
spin_lock_irqsave(&ioc->lock, flags);
- BUG_ON(ioc->ioc_data == cic);
+ BUG_ON(rcu_dereference_check(ioc->ioc_data,
+ lockdep_is_held(&ioc->lock)) == cic);
radix_tree_delete(&ioc->radix_root, cfqd->cic_index);
hlist_del_rcu(&cic->cic_list);
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