diff --git a/[refs] b/[refs]
index 2366d95bc7bd..f5d4533a4d9e 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: acc6be5405b90c9f0fb0eb8a74ec4d4b7b5bf48f
+refs/heads/master: b618ad31bb2020db6a36929122e5554e33210d47
diff --git a/trunk/include/linux/stacktrace.h b/trunk/include/linux/stacktrace.h
index 551f6c7d5044..51efbef38fb0 100644
--- a/trunk/include/linux/stacktrace.h
+++ b/trunk/include/linux/stacktrace.h
@@ -4,6 +4,8 @@
 struct task_struct;
 
 #ifdef CONFIG_STACKTRACE
+struct task_struct;
+
 struct stack_trace {
 	unsigned int nr_entries, max_entries;
 	unsigned long *entries;