X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=kernel%2Flockdep.c;h=0c30d0455de12e02bad459a1da7cd0641ef4d76e;hb=830ec0458c390f29c6c99e1ff7feab9e36368d12;hp=c62ec14609b990780f7aceb1733a7ca7dd2ab945;hpb=48d50674179981e41f432167b2441cec782d5484;p=safe%2Fjmp%2Flinux-2.6

diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index c62ec14..0c30d04 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);