From: Paul E. McKenney <paul.mckenney@linaro.org>
Date: Tue, 17 Apr 2012 16:24:41 +0000 (-0700)
Subject: rcu: Add exports for per-CPU variables used for inlining
X-Git-Tag: next-20120430~26^2^3
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e798cf3385d3aa7c84afa65677eb92e0c0876dfd;p=karo-tx-linux.git

rcu: Add exports for per-CPU variables used for inlining

The new rcu_read_lock_nesting and rcu_read_unlock_special per-CPU
variables need to be accessible from modules to allow rcu_read_lock()
and rcu_read_unlock() to continue to be used from modules.  This
commit therefore adds the needed EXPORT_PER_CPU_SYMBOL_GPL()s.

Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---

diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index d52c68e149fe..ef83774728f4 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -53,7 +53,9 @@
 
 #ifdef CONFIG_PREEMPT_RCU
 DEFINE_PER_CPU(int, rcu_read_lock_nesting);
+EXPORT_PER_CPU_SYMBOL_GPL(rcu_read_lock_nesting);
 DEFINE_PER_CPU(int, rcu_read_unlock_special);
+EXPORT_PER_CPU_SYMBOL_GPL(rcu_read_unlock_special);
 #ifdef CONFIG_PROVE_RCU
 DEFINE_PER_CPU(struct task_struct *, rcu_current_task);
 #endif /* #ifdef CONFIG_PROVE_RCU */