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Subject[RFC PATCH] rcu: config: Remove prompt for RCU implementation
Date
The RCU implementation which is chosen is dependent on PREEMPT and SMP config
options and is not really a user-selectable choice. The following change will
remove the menu entry and will be derived from the above two options.

Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
---
init/Kconfig | 18 ++++++------------
1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index 0b37750..7707e4a 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -463,13 +463,9 @@ endmenu # "CPU/Task time and stats accounting"

menu "RCU Subsystem"

-choice
- prompt "RCU Implementation"
- default TREE_RCU
-
config TREE_RCU
- bool "Tree-based hierarchical RCU"
- depends on !PREEMPT && SMP
+ bool
+ default y if !PREEMPT && SMP
help
This option selects the RCU implementation that is
designed for very large SMP system with hundreds or
@@ -477,8 +473,8 @@ config TREE_RCU
smaller systems.

config PREEMPT_RCU
- bool "Preemptible tree-based hierarchical RCU"
- depends on PREEMPT
+ bool
+ default y if PREEMPT
help
This option selects the RCU implementation that is
designed for very large SMP systems with hundreds or
@@ -489,16 +485,14 @@ config PREEMPT_RCU
Select this option if you are unsure.

config TINY_RCU
- bool "UP-only small-memory-footprint RCU"
- depends on !PREEMPT && !SMP
+ bool
+ default y if !PREEMPT && !SMP
help
This option selects the RCU implementation that is
designed for UP systems from which real-time response
is not required. This option greatly reduces the
memory footprint of RCU.

-endchoice
-
config RCU_EXPERT
bool "Make expert-level adjustments to RCU configuration"
default n
--
1.9.1


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