Commit e72aeafc authored by Pranith Kumar's avatar Pranith Kumar Committed by Paul E. McKenney

rcu: Remove prompt for RCU implementation

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: default avatarPranith Kumar <bobby.prani@gmail.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 26730f55
......@@ -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
......
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