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From fb3dacce075441d4a157bb63b96bf666084a99b1 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:30:30 -0500
Subject: [PATCH] RCU: Force PREEMPT_RCU for PREEMPT-RT
commit b526aded4c39a83d7042b9b16dee342e1f600795 in tip.
PREEMPT_RT relies on PREEMPT_RCU - only allow RCU to be configured
interactively in the !PREEMPT_RT case.
[PG: add TINY_RCU to blacklist]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---
init/Kconfig | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/init/Kconfig b/init/Kconfig
index eb77e8c..c1fa035 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -328,6 +328,7 @@ choice
config TREE_RCU
bool "Tree-based hierarchical RCU"
+ depends on !PREEMPT_RT
help
This option selects the RCU implementation that is
designed for very large SMP system with hundreds or
@@ -346,7 +347,7 @@ config TREE_PREEMPT_RCU
config TINY_RCU
bool "UP-only small-memory-footprint RCU"
- depends on !SMP
+ depends on !SMP && !PREEMPT_RT
help
This option selects the RCU implementation that is
designed for UP systems from which real-time response
--
1.7.0.4
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