From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Wed, 11 Jan 2012 23:30:36 +0000 (-0800)
Subject: rcu: Streamline code produced by __rcu_read_unlock()
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=afef20540f7cd1ea91bc1ac20be238389eee4003;p=openwrt%2Fstaging%2Fblogic.git

rcu: Streamline code produced by __rcu_read_unlock()

This is a port of commit #be0e1e21 to TINY_PREEMPT_RCU.  This uses
noinline to prevent rcu_read_unlock_special() from being inlined into
__rcu_read_unlock().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---

diff --git a/kernel/rcutiny_plugin.h b/kernel/rcutiny_plugin.h
index 432ed2bc05ad..b58a3200f0ff 100644
--- a/kernel/rcutiny_plugin.h
+++ b/kernel/rcutiny_plugin.h
@@ -544,7 +544,7 @@ EXPORT_SYMBOL_GPL(__rcu_read_lock);
  * notify RCU core processing or task having blocked during the RCU
  * read-side critical section.
  */
-static void rcu_read_unlock_special(struct task_struct *t)
+static noinline void rcu_read_unlock_special(struct task_struct *t)
 {
 	int empty;
 	int empty_exp;