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-rw-r--r--kernel/lockdep.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index c62ec14609b9..0c30d0455de1 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -3809,3 +3809,21 @@ void lockdep_sys_exit(void)
lockdep_print_held_locks(curr);
}
}
+
+void lockdep_rcu_dereference(const char *file, const int line)
+{
+ struct task_struct *curr = current;
+
+ if (!debug_locks_off())
+ return;
+ printk("\n===================================================\n");
+ printk( "[ INFO: suspicious rcu_dereference_check() usage. ]\n");
+ printk( "---------------------------------------------------\n");
+ printk("%s:%d invoked rcu_dereference_check() without protection!\n",
+ file, line);
+ printk("\nother info that might help us debug this:\n\n");
+ lockdep_print_held_locks(curr);
+ printk("\nstack backtrace:\n");
+ dump_stack();
+}
+EXPORT_SYMBOL_GPL(lockdep_rcu_dereference);