From 965a002b4f1a458c5dcb334ec29f48a0046faa25 Mon Sep 17 00:00:00 2001
From: "Paul E. McKenney" <paul.mckenney@linaro.org>
Date: Sat, 18 Jun 2011 09:55:39 -0700
Subject: rcu: Make TINY_RCU also use softirq for RCU_BOOST=n

This patch #ifdefs TINY_RCU kthreads out of the kernel unless RCU_BOOST=y,
thus eliminating context-switch overhead if RCU priority boosting has
not been configured.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
 include/linux/rcutiny.h | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'include/linux/rcutiny.h')

diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
index 4eab233a00cd..00b7a5e493d2 100644
--- a/include/linux/rcutiny.h
+++ b/include/linux/rcutiny.h
@@ -27,9 +27,13 @@
 
 #include <linux/cache.h>
 
+#ifdef CONFIG_RCU_BOOST
 static inline void rcu_init(void)
 {
 }
+#else /* #ifdef CONFIG_RCU_BOOST */
+void rcu_init(void);
+#endif /* #else #ifdef CONFIG_RCU_BOOST */
 
 static inline void rcu_barrier_bh(void)
 {
-- 
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