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Subject[PATCH tip/core/rcu 23/24] rcu: Remove prompt for RCU implementation
Date
From: Pranith Kumar <bobby.prani@gmail.com>

The RCU implementation is chosen based on PREEMPT and SMP config options
and is not really a user-selectable choice. This commit removes the
menu entry, given that there is not much point in calling something a
choice when there is in fact no choice.. The TINY_RCU, TREE_RCU, and
PREEMPT_RCU Kconfig options continue to be selected based solely on the
values of the PREEMPT and SMP options.

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

diff --git a/init/Kconfig b/init/Kconfig
index af2c93c4a105..4c08197044f1 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -465,13 +465,9 @@ 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
@@ -479,8 +475,8 @@ 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
@@ -491,16 +487,14 @@ 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
--
1.8.1.5


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