From 4ee0a603926cad973e4d384f48c5e279a0fd4118 Mon Sep 17 00:00:00 2001
From: Dongdong Deng <dongdong.deng@windriver.com>
Date: Tue, 28 Sep 2010 16:32:43 +0800
Subject: [PATCH] rcu: using ACCESS_ONCE() to observe the
 jiffies_stall/rnp->qsmask value

Using ACCESS_ONCE() to observe the jiffies_stall/rnp->qsmask value
due to the caller didn't hold the root_rcu/rnp node's lock.  Although
use without ACCESS_ONCE() is safe due to the value loaded being used
but once, the ACCESS_ONCE() is a good documentation aid -- the variables
are being loaded without the services of a lock.

Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
CC: Dipankar Sarma <dipankar@in.ibm.com>
CC: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
Reading git-format-patch failed