From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Sun, 8 Sep 2013 18:51:06 +0000 (-0700)
Subject: rcu: Change EXPORT_SYMBOL() to EXPORT_SYMBOL_GPL()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f9ffc31ebd38d2d74dbfe9f0b67274e99ad668f5;p=linux-beck.git

rcu: Change EXPORT_SYMBOL() to EXPORT_SYMBOL_GPL()

Commit e6b80a3b (rcu: Detect illegal rcu dereference in extended
quiescent state) exported the pre-existing rcu_is_cpu_idle() function
using EXPORT_SYMBOL().  However, this is inconsistent with the remaining
exports from RCU, which are all EXPORT_SYMBOL_GPL().  The current state
of affairs means that a non-GPL module could use rcu_is_cpu_idle(),
but in a CONFIG_TREE_PREEMPT_RCU=y kernel would be unable to invoke
rcu_read_lock() and rcu_read_unlock().

This commit therefore makes rcu_is_cpu_idle()'s export be consistent
with the rest of RCU, namely EXPORT_SYMBOL_GPL().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
---

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 910d868808dc..1b123e179d71 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -669,7 +669,7 @@ int rcu_is_cpu_idle(void)
 	preempt_enable();
 	return ret;
 }
-EXPORT_SYMBOL(rcu_is_cpu_idle);
+EXPORT_SYMBOL_GPL(rcu_is_cpu_idle);
 
 /**
  * __rcu_is_watching - are RCU read-side critical sections safe?