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Subject[PATCH RT 07/13] rcu: make RCU_BOOST default on RT without EXPERT
4.14.87-rt50-rc1 stable review patch.
If anyone has any objections, please let me know.

------------------

From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

[ Upstream commit 78cab7cb632b6a4c84e78e4f12bb9e83c09b8885 ]

Paul E. McKenney suggested to allow enabling RCU_BOOST on RT without the
need to go through the EXPERT option first.

Suggeted-by: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
kernel/rcu/Kconfig | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig
index 0be2c96fb640..a243a78ff38c 100644
--- a/kernel/rcu/Kconfig
+++ b/kernel/rcu/Kconfig
@@ -36,7 +36,7 @@ config TINY_RCU

config RCU_EXPERT
bool "Make expert-level adjustments to RCU configuration"
- default y if PREEMPT_RT_FULL
+ default n
help
This option needs to be enabled if you wish to make
expert-level adjustments to RCU configuration. By default,
@@ -190,7 +190,7 @@ config RCU_FAST_NO_HZ

config RCU_BOOST
bool "Enable RCU priority boosting"
- depends on RT_MUTEXES && PREEMPT_RCU && RCU_EXPERT
+ depends on (RT_MUTEXES && PREEMPT_RCU && RCU_EXPERT) || PREEMPT_RT_FULL
default y if PREEMPT_RT_FULL
help
This option boosts the priority of preempted RCU readers that
--
2.19.2

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