lockdep: handle chains involving classes defined in modules

[firefly-linux-kernel-4.4.55.git] / kernel / lockdep.c

diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 410c3365ad8f78f25bd81148f860eda31f9a02dd..ab933fecd2a181fa245ec72e5303dbfc256e5dbd 100644 (file)
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -3176,6 +3176,7 @@ static void zap_class(struct lock_class *class)
        list_del_rcu(&class->hash_entry);
        list_del_rcu(&class->lock_entry);
 
+       class->key = NULL;
 }
 
 static inline int within(const void *addr, void *start, unsigned long size)