From a48f994e674cb9f04ad792cc7bf1e47fbed87c7e Mon Sep 17 00:00:00 2001
From: "Paul E. McKenney" <paul.mckenney@linaro.org>
Date: Thu, 5 Jan 2012 14:44:39 -0800
Subject: [PATCH] --- yaml --- r: 288543 b: refs/heads/master c:
 0bb7b59d6e2b8440cd7097097dd4bbfc4d76ed07 h: refs/heads/master i:   288541:
 0acd429b8dac4e9d6d1bf4e50270ccc19468366b   288539:
 43b37b958047fd28b7ac08c68fc7f9b6d61c7dd7   288535:
 34fdbbcebf0db11ffc4c35e5bde3db8547418d06   288527:
 19f01ef6ec1cd91404b03f6d7d3d5b1f6cfb6538   288511:
 c86ec1a70f3d84b21dda5fcd5600fc576d6aeaeb v: v3

---
 [refs]                 | 2 +-
 trunk/kernel/rcutree.c | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 967ed88e1f8d..71c2ae17b962 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fe15d706cfc1cb321dbe2329b04b5ca185edff60
+refs/heads/master: 0bb7b59d6e2b8440cd7097097dd4bbfc4d76ed07
diff --git a/trunk/kernel/rcutree.c b/trunk/kernel/rcutree.c
index 3cf713a724c1..570f7530f4b3 100644
--- a/trunk/kernel/rcutree.c
+++ b/trunk/kernel/rcutree.c
@@ -1707,6 +1707,7 @@ __call_rcu(struct rcu_head *head, void (*func)(struct rcu_head *rcu),
 	unsigned long flags;
 	struct rcu_data *rdp;
 
+	WARN_ON_ONCE((unsigned long)head & 0x3); /* Misaligned rcu_head! */
 	debug_rcu_head_queue(head);
 	head->func = func;
 	head->next = NULL;