From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 14 Sep 2016 11:52:17 +0200
Subject: rbtree: include rcu.h because we use it
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git
Git-commit: ae78de47ee80bb98aa5b3d3311b4b2a72cf699d1
Patch-mainline: Queued in subsystem maintainer repository
References: SLE Realtime Extension

Since commit c1adf20052d8 ("Introduce rb_replace_node_rcu()")
rbtree_augmented.h uses RCU related data structures but does not include
them. It works as long as gets somehow included before that and fails
otherwise.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Mike Galbraith <mgalbraith@suse.de>
---
 include/linux/rbtree_augmented.h |    1 +
 include/linux/rbtree_latch.h     |    1 +
 2 files changed, 2 insertions(+)

--- a/include/linux/rbtree_augmented.h
+++ b/include/linux/rbtree_augmented.h
@@ -26,6 +26,7 @@
 
 #include <linux/compiler.h>
 #include <linux/rbtree.h>
+#include <linux/rcupdate.h>
 
 /*
  * Please note - only struct rb_augment_callbacks and the prototypes for
--- a/include/linux/rbtree_latch.h
+++ b/include/linux/rbtree_latch.h
@@ -34,6 +34,7 @@
 
 #include <linux/rbtree.h>
 #include <linux/seqlock.h>
+#include <linux/rcupdate.h>
 
 struct latch_tree_node {
 	struct rb_node node[2];