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rcu: Remove prompt for RCU implementation

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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>
This commit is contained in:
Pranith Kumar 2015-04-21 17:29:42 -04:00 committed by Paul E. McKenney
parent 26730f55c2
commit e72aeafc66
1 changed files with 6 additions and 12 deletions
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18
init/Kconfig
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@ -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